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Lighting Solutions  
User currently offlineDocLightning From United States of America, joined Nov 2005, 20241 posts, RR: 59
Posted (2 years 1 month 3 weeks 6 days 14 hours ago) and read 3536 times:

Most of the lighting in our house is CFL. I have to say that I like CFL's. They make a very nice, soft light that is visually indistinguishable from an incandescent, but yet somehow a bit softer, with less sharp shadows. They're also somewhat bulky, take forever to get up to full light intensity (our front porch light takes ten minutes), and break easily. I also have colored accent CFL uplights in every corner behind my plants, throwing crazy shadows onto the ceiling when the lights are off. I like the purity of the light a colored CFL makes. Also, while some do come dimmable, they are finicky to dim.

I have a few LED's. They make fantastic light (the good [read expensive] ones do), turn on instantly, have amazing energy efficiency, often come dimmable, and last forever. All my LED house lights are on dimmer switches and they are amazing. They are a touch bigger (usually length) than their incandescent counterparts. I really like them and I'd honestly love to use them in every light in my house except they're so expensive! That would be a $1,000 commitment to a rental home. Not a bright idea. (Pardon the pun)

What do you like in your home?

75 replies: All unread, showing first 25:
 
User currently offlineTSS From United States of America, joined Dec 2006, 3070 posts, RR: 5
Reply 1, posted (2 years 1 month 3 weeks 6 days 13 hours ago) and read 3514 times:

Because of concerns over the mercury content of CFL bulbs, I'm still using incandescent bulbs in my home except for one CFL in the kitchen that was here when I moved in. I use 75w bulbs in my lamps, 40w bulbs in the triple-bulb overhead fixtures, and 25w bulbs in the two quadruple-bulb bathroom fixtures.

Like Doc Lightning, I'd prefer to go with all LED lights but they're just too expensive at present.



Able to kill active threads stone dead with a single post!
User currently offlinecomorin From United States of America, joined May 2005, 4903 posts, RR: 16
Reply 2, posted (2 years 1 month 3 weeks 6 days 13 hours ago) and read 3515 times:

Quoting DocLightning (Thread starter):
They make a very nice, soft light that is visually indistinguishable from an incandescent, but yet somehow a bit softer, with less sharp shadows

1. You should change your name to DocLighting.

2. I have been lurking in India the last few months and the CFLs you get here tend to be blue-ish (6500K) - what color temperature are your CFLs? I can't stand the 'cool' tones - reminds me of the tube lights of the 50's. I did find CFLs with great difficultly that were warmer, but 2750K is too yellow.

So LEDs are the way to go, you think?


Thanks


User currently offlinestasisLAX From United States of America, joined Jul 2007, 3286 posts, RR: 6
Reply 3, posted (2 years 1 month 3 weeks 6 days 13 hours ago) and read 3513 times:

I have a mix of lighting types in my home. I have an old-style long fluorescent tube lights in the (1980's vintage) built-in kitchen ceiling fixture, a couple of small incandescent bulbs in the dining room fixture, a red CFL in the hallway ceiling fixture (so not to wake anyone else in the apartment when turned on in the middle of the night for a bathroom trip - my friend sings "Roxanne" whenever I turn it on!), an LED light in the bathroom, and a handpainted incandescent bulb in the floor lamp in the living room (for some relaxing mood lighting) - along with CFLs in the end table lamps and CFLs in the lamps in the bedrooms. My adjustable height desk lamp has a super bright LED bulb in it.

An eco-friendly friend of mine gave me a box of a dozen CFL lights from Cosco when I moved into this space as a housewarming gift, and he then proceeded to change out the incandescent bulbs throughout the apartment for me - which was pretty awesome!   



"Those who would give up essential liberty to purchase temporary safety deserve neither liberty nor safety!" B.Franklin
User currently offlineAesma From France, joined Nov 2009, 6844 posts, RR: 12
Reply 4, posted (2 years 1 month 3 weeks 6 days 13 hours ago) and read 3507 times:

All CFL here, incandescent aren't available anymore in the EU.

The few old CFL I still have that have years on them (proving they're as durable as advertised) do indeed take forever to get to full brightness and I should replace them. The newer ones are good, I have mostly "solar yellow" ones. LEDs should be great to replace halogen spots but outside the bathroom I don't use those. For normal bulbs replacement they have to put tons of LEDs in one "bulb" since they only shine in one direction, that's hardly economical.



New Technology is the name we give to stuff that doesn't work yet. Douglas Adams
User currently offlineBraybuddy From India, joined Aug 2004, 5793 posts, RR: 32
Reply 5, posted (2 years 1 month 3 weeks 6 days 10 hours ago) and read 3467 times:

Quoting DocLightning (Thread starter):
I have to say that I like CFL's.

I love innovation and trying out new things, but I just can't get used to appearance of CFL bulbs in normal lampshades, unless they are disguised to look like incandescent ones. The only time I'll use them otherwise is inside opaque lampshades.

In the kitchen I have two tracks of halogen bulbs, which is a bitch as they don't have a great life cycle, for some reason. I tried using LEDs, but they were the same and I thought the light was harsh and cold. For dinner parties I'll use only candles and night-lights, which are always great for atmosphere.


User currently offlineKiwiRob From New Zealand, joined Jun 2005, 7673 posts, RR: 4
Reply 6, posted (2 years 1 month 3 weeks 6 days 9 hours ago) and read 3454 times:

Quoting DocLightning (Thread starter):
They make a very nice, soft light that is visually indistinguishable from an incandescent, but yet somehow a bit softer, with less sharp shadows.

No the light they make is very different, I would use Osram Halogen Energy Saver Lamps, they give an excellent natural light, they have a very long life, they use significantly less energy than incandescent, and are dimmable.


Quoting Braybuddy (Reply 5):
In the kitchen I have two tracks of halogen bulbs, which is a bitch as they don't have a great life cycle, for some reason.

You must have some problems with the power in your home, I've got 40 or so 50w halogen spots in my home, they have all been installed over the past 5 years, I've not had a single one blow. I love the spots, they are all on dimmer switches, the light is fantastic.

The big problem with LEDS at the moment is heat, they run very very hot and need careful heat management, not hot to touch from the front all the heat goes out the back, that's why I would only buy LEDS from Osram, Philips, and GE.


User currently offlineKlaus From Germany, joined Jul 2001, 21495 posts, RR: 53
Reply 7, posted (2 years 1 month 3 weeks 6 days 9 hours ago) and read 3450 times:



Quoting Aesma (Reply 4):
For normal bulbs replacement they have to put tons of LEDs in one "bulb" since they only shine in one direction, that's hardly economical.

Why not? Each LED is a very small, almost point-shaped light source. One very strong LED would still cast rather sharp shadows which is generally not desirable, so you can either put a diffusor over it (which reduces overall efficiency) or simply use several smaller LEDs in a "bulb" which can keep the efficiency higher, distribute the light source a bit and evade the cooling problems a single LED usually produces.

Quoting Braybuddy (Reply 5):
In the kitchen I have two tracks of halogen bulbs, which is a bitch as they don't have a great life cycle, for some reason. I tried using LEDs, but they were the same

Halogen spots produce a lot of light from a very small bulb, but they get very hot doing it.

LEDs waste less energy through heat, but they still get hot, and they are much more susceptible to damage from it. Your LED spots were probably not cooled properly and died from overheating.

In many cases you cannot just switch out halogen for LEDs.

LEDs are better suited for entire strips of multiple LEDs instead of only a few very bright spots.

Another thing to be aware of is that LEDs should not be driven by AC, not even just by rectified but unfiltered AC – actually filtered DC (switched at high frequency for dimming) is much preferable because LEDs have no inertia.

You would get a "strobe light" effect otherwise, much more so than with conventional bulbs, which mostly filter out AC components through their sheer inertia.

[Edited 2012-09-30 02:11:01]

User currently offlinefrancoflier From France, joined Oct 2001, 3814 posts, RR: 11
Reply 8, posted (2 years 1 month 3 weeks 6 days 9 hours ago) and read 3439 times:

I try to use as many incandescent as I can. I never found CFLs to be an adequate replacement.

Yes, they consume more, but are a better fit in transiently lit places like the bathroom. CFLs (or rather the electronics inside them) don't like cycles. I have yet to be convinced the energy savings is not cancelled by their price, the environmental impact of their manufacturing and discarding and the 'not as long as advertised' longevity.

Incandescent do waste a lot of energy through heat, but then I do have to heat the place up for 6 months of the year...

We can't buy them anymore around here so I guess it's moot. I'm switching to a mix of CFL, neon and halogen depending on the use of each light.



Looks like I picked the wrong week to quit posting...
User currently offlineKiwiRob From New Zealand, joined Jun 2005, 7673 posts, RR: 4
Reply 9, posted (2 years 1 month 3 weeks 6 days 7 hours ago) and read 3420 times:

Quoting francoflier (Reply 8):
I try to use as many incandescent as I can. I never found CFLs to be an adequate replacement.

You should consider using halogen energy saver bulbs, they are a direct replacement for the classic incandescent bulb but with much longer life and lower energy consumption, they also look pretty much the same.


User currently offlineBraybuddy From India, joined Aug 2004, 5793 posts, RR: 32
Reply 10, posted (2 years 1 month 3 weeks 6 days 7 hours ago) and read 3419 times:

Quoting KiwiRob (Reply 6):
You must have some problems with the power in your home, I've got 40 or so 50w halogen spots in my home, they have all been installed over the past 5 years
Quoting Klaus (Reply 7):
LEDs waste less energy through heat, but they still get hot, and they are much more susceptible to damage from it. Your LED spots were probably not cooled properly and died from overheating

I'll have to get it investigated: I remember posting a thread on it here several years ago but got no conclusive answer. It's an old house, but I had it completely re-wired 40 years ago.


User currently offlineKlaus From Germany, joined Jul 2001, 21495 posts, RR: 53
Reply 11, posted (2 years 1 month 3 weeks 6 days 7 hours ago) and read 3417 times:

Quoting Braybuddy (Reply 10):
I'll have to get it investigated: I remember posting a thread on it here several years ago but got no conclusive answer. It's an old house, but I had it completely re-wired 40 years ago.

I doubt the wiring is the problem; As long as there are no substantial voltage spikes (which is relatively unlikely), external factors are probably not the cause.

Halogen lighting is just completely different from LED lighting in its heat and light distribution if each is designed properly.

LED lighting ideally would use more distributed LED strips with many separate LEDs instead of only a few intense spots as usual with halogen. This way each LED runs much cooler (because the heat is distributed over a much larger area) and lives much longer than only a few very bright LEDs which run very hot if they have no additional cooling and then suffer reduced lifespans.


User currently offlineBraybuddy From India, joined Aug 2004, 5793 posts, RR: 32
Reply 12, posted (2 years 1 month 3 weeks 6 days 7 hours ago) and read 3406 times:

Quoting Klaus (Reply 11):
I doubt the wiring is the problem; As long as there are no substantial voltage spikes (which is relatively unlikely), external factors are probably not the cause.

That's interesting Klaus. I don't have a problem with any of the other electrics in the house at all. Seeing that I've had the problem with both halogen and LED bulbs, maybe it's time to buy some new light fittings using CFL bulbs. I've been keeping any eye out for something suitable for a while now without success. I have a fair idea of what I want, but not having much success in finding them. There was one in Ikea that came close, but I want to be completely happy with whatever I go for.


User currently offlineKlaus From Germany, joined Jul 2001, 21495 posts, RR: 53
Reply 13, posted (2 years 1 month 3 weeks 6 days 6 hours ago) and read 3400 times:

The thing is that LED lighting changes not just the light source, but it also changes how lamps should be designed at all. There are 1:1 replacements, but not for every kind of use. Good LED lighting works differently than incandescent or CFL lighting does. Which are already not 1:1 replacements of each other - even just halogen lamps already drive different designs than regular bulbs, and so do LEDs.

User currently offlinefrancoflier From France, joined Oct 2001, 3814 posts, RR: 11
Reply 14, posted (2 years 1 month 3 weeks 6 days 6 hours ago) and read 3397 times:

Quoting KiwiRob (Reply 9):
You should consider using halogen energy saver bulbs, they are a direct replacement for the classic incandescent bulb but with much longer life and lower energy consumption, they also look pretty much the same.

I am. That's what I clumsily meant by 'halogen'.
They're still way more expensive than a regular incandescent bulb and I haven't made the calculation but given they're only about 15-20% more efficient than an incandescent the price difference, I'm not completely convinced they're really a smarter choice than Edison's originals...

Quoting Klaus (Reply 11):
LED lighting ideally would use more distributed LED strips with many separate LEDs instead of only a few intense spots as usual with halogen.

Exactly. If you concentrate anything above a handful of watts of LED power in a single compact source, you need a massive radiator to keep it cool... The lighting setup of new build houses will have to be radically different.



Looks like I picked the wrong week to quit posting...
User currently offlinebristolflyer From United Kingdom, joined May 2004, 2309 posts, RR: 0
Reply 15, posted (2 years 1 month 3 weeks 6 days 4 hours ago) and read 3369 times:

Quoting Braybuddy (Reply 5):
In the kitchen I have two tracks of halogen bulbs, which is a bitch as they don't have a great life cycle, for some reason.

Do you have MR16 lamps? They don't have a great life. There are some good LED replacements out there but none that will match output if you're currently using 50w. Philips do a 10w which is close to 35w equivalent.

We have a mixture of incandescent, CFL & LED. As with all technologies buy the good brands otherwise you'll get crappy product. GE, Osram Sylvania, Philips, TCP and CREE (LED) are all good.

I recently did a kitchen renovation and installed CREE CR6 LED fixtures in 6" recessed cans - they're awesome. Great light, dimmable and very efficient. I would definitely recommend LED fixtures over LED screw-ins if you have 6" cans. LED trim fixtures are designed specifically for cans so all the light exits whee it should, whereas LED screw-ins aren't so waste a lot of light in the can itself. They're expensive but worth it.



Fortune favours the brave
User currently offlinerfields5421 From United States of America, joined Jul 2007, 7607 posts, RR: 32
Reply 16, posted (2 years 1 month 3 weeks 6 days 4 hours ago) and read 3360 times:

My kitchen has six bright spot lights. I moved from incandescent to CFL and eventually to LED.

It makes a noticable improvement in the light, and the electric bill.

We have a lot of CFL around the house, a few incandescent, and use LED reading lights.

I don't worry about the mercury content in CFL. On the overall scale of risks in a typical home - it is way, way down the list. Far below cigarette smoking (which my daughter does - who won't use CFL bulbs in her home because of the risk).

The one problem I have with CFL bulbs is that they are not available in certain color temperature ranges. In my model railroad, and a couple other places - I want a very specific color temp for the light. Incandescent gives me the most flexibility, though I vastly prefer flourescent when possible to do lower energy usage and heat generation.


User currently offlineKlaus From Germany, joined Jul 2001, 21495 posts, RR: 53
Reply 17, posted (2 years 1 month 3 weeks 6 days 4 hours ago) and read 3355 times:

Quoting rfields5421 (Reply 16):
I don't worry about the mercury content in CFL. On the overall scale of risks in a typical home - it is way, way down the list. Far below cigarette smoking (which my daughter does - who won't use CFL bulbs in her home because of the risk).

When they are operating, the mercury will be in vapour form. If the glass breaks in that state you'll have a major contamination event – particularly if you breathe it in. That can be very unhealthy including long-term damage, a lot more than "just" smoking cigarettes, which is bad enough by itself.

Recycling is also a major issue since the mercury is effectively toxic waste which is difficult to recycle from (C)FLs. LEDs are not entirely environment-friendly through their entire life cycle either, but at least they're not directly toxic.


User currently offlineKiwiRob From New Zealand, joined Jun 2005, 7673 posts, RR: 4
Reply 18, posted (2 years 1 month 3 weeks 6 days 1 hour ago) and read 3322 times:

Quoting francoflier (Reply 14):
I'm not completely convinced they're really a smarter choice than Edison's originals...

Problem is in Europe you can't buy Edison's originals anymore so halogen energy savers are you only real choice.

Quoting francoflier (Reply 14):


Exactly. If you concentrate anything above a handful of watts of LED power in a single compact source, you need a massive radiator to keep it cool... The lighting setup of new build houses will have to be radically different.

There in lies the problem, most light's on sale today are still designed with traditional lighting methods in mind, when you convert these to LED they generally don't work very well.

A really good example of a floodlight designed specifically for LED is the Glamox FX60. The back is a completely open heatsink



Compared to a traditional halogen or high pressure sodium like the GFX

http://www.jgarraio.pt/images/produtos/comercial/equipamentos_iluminacao_maritima/projectores_para_atmosferas_explosivas/norselight/eexd/16199.jpg


It's a completely different design philosophy, the GFX could have been converted to LED but it would have been compromised. The best advantage of LED is the ability to work in cold temperatures, the FX60 is certified for use to -50 whereas the GFX is limited to -30.


User currently offlineplanejamie From United Kingdom, joined Sep 2011, 576 posts, RR: 1
Reply 19, posted (2 years 1 month 3 weeks 6 days ago) and read 3302 times:

I have 8x LED spots in my bathroom, they essentially replaced Halogen fittings (albeit a completely rewired system, not just a bulb replacement) and I've had no problems with heat at all, I can leave them on for hours and there's zero heat from the bulb itself if you touch it, compared to touching a halogen or incandescent bulb where you'd probably fry your fingers. Each fitting has 3 LED bulbs arranged in a triangle and they generate a nice even soft light. I think if you want to go for LEDs you'll need to spend the money putting new fittings (they can fit exactly where the halogen ones did) and a whole new "system" in for them (transformers etc). They work off a normal lightswitch so nothing fancy there, but they've lasted 18 months so far and didn't require that much extensive work to put them in (simply removing the old transformers for the halogen bulbs and sticking the LED system in).

However, the people fitting the new kitchen advised us to keep our existing halogen bulbs (which we've never replaced since buying the house, so that's 9 years at least) as they've heard about people having issues with the LED systems catching fire?

As for CFLs or "energy saving" bulbs, you can now get the ones that look just like incandescent bulbs (even the "flame" looking ones) and they only take a few minutes to warm up, as I live in the UK and (unfortunately) we're part of the EU you can't get 60W or 100W incandescent bulbs anymore. The CFLs we have seem to last a while the last one I replaced we had for 7 years and bought from IKEA I believe. For a kitchen I quite like the Triphosphor bulbs we have under the cupboards, they cast a nice warm glow and warm up instantly (no flickering) and are quite a low wattage/heat output. They're also very slimline.


User currently offlineBraybuddy From India, joined Aug 2004, 5793 posts, RR: 32
Reply 20, posted (2 years 1 month 3 weeks 5 days 23 hours ago) and read 3291 times:

Quoting bristolflyer (Reply 15):
Do you have MR16 lamps? They don't have a great life.

I'm using a mix of different makes as I usually stock up with a couple of packets when I run out of replacements, so I haven't a clue what types I'm using at the mo.


User currently offlinebristolflyer From United Kingdom, joined May 2004, 2309 posts, RR: 0
Reply 21, posted (2 years 1 month 3 weeks 5 days 19 hours ago) and read 3266 times:

MR16 is the type, not a brand. They're 2' in diameter. Like this:

http://www.affordablequalitylighting...0w-mr16-12v-halogen-bulb-surecolor

They get very hot and are susceptible to vibration - eg from someone walking on the floor above.



Fortune favours the brave
User currently offlineAesma From France, joined Nov 2009, 6844 posts, RR: 12
Reply 22, posted (2 years 1 month 3 weeks 5 days 19 hours ago) and read 3260 times:

Quoting Klaus (Reply 7):
Why not?

Because LEDs are made of semiconductor wafers, so putting many around a big radiator gets expensive.



New Technology is the name we give to stuff that doesn't work yet. Douglas Adams
User currently offlineKlaus From Germany, joined Jul 2001, 21495 posts, RR: 53
Reply 23, posted (2 years 1 month 3 weeks 5 days 18 hours ago) and read 3238 times:

Quoting Aesma (Reply 22):
Because LEDs are made of semiconductor wafers, so putting many around a big radiator gets expensive.

Single high-power LEDs can be even more expensive than several mid- or low-power ones and they need more cooling because they dissipate a lot more heat in about the same area as one of the smaller ones.

With lower-power LEDs good cooling can be a lot easier since the heat production is already distributed.


User currently offlineDocLightning From United States of America, joined Nov 2005, 20241 posts, RR: 59
Reply 24, posted (2 years 1 month 3 weeks 5 days 18 hours ago) and read 3236 times:

Quoting TSS (Reply 1):

Because of concerns over the mercury content of CFL bulbs, I'm still using incandescent bulbs in my home

There is debate whether the decreased power plant mercury emissions caused by CFL use offset the mercury issue. Ideally, I'd go for all LED's, but that would be a proposition of a few hundred dollars in a rental house that would basically be a donation to the landlord. The CFL's are much cheaper and save us a lot on energy.

Quoting comorin (Reply 2):
2. I have been lurking in India the last few months and the CFLs you get here tend to be blue-ish (6500K) - what color temperature are your CFLs? I can't stand the 'cool' tones - reminds me of the tube lights of the 50's. I did find CFLs with great difficultly that were warmer, but 2750K is too yellow.

Most CFL's here are 2700K to 3000K. The 2700K is slightly yellower than an incandescent. The 3000K is slightly bluer, but not unpleasantly so like 5,000K+. I find that when most of the house is lit by them, it's hard to notice the yellow.

Quoting francoflier (Reply 8):
Yes, they consume more, but are a better fit in transiently lit places like the bathroom.

For places that have a lot of on-and-off, LED or incandescent is the way to go. Especially for motion-sensing lights.

Quoting planejamie (Reply 19):
As for CFLs or "energy saving" bulbs, you can now get the ones that look just like incandescent bulbs (even the "flame" looking ones)

I do have candelabra bulbs. They make good light, but they're ugly and have black writing on the side.


25 Ken777 : We use CFLs where possible and, when affordable, will move to LEDs. I'm actually surprised that there are not multiple LED light factories already bui
26 bristolflyer : I watched a video of the CEO of TCP (one of the largest CFL mfrs in the world), in it he took the mercury from a typical CFL on his finger and ate it
27 nws2002 : CFL's give me a headache, I'm not sure why buy they do. So I use a mix of incandescent, halogen, and LED. I've been replacing the incandescents with h
28 DocLightning : Hubby and I are looking into buying a place. I wonder how expensive a built-in system is with adjustable colors... I have CFL's that are three months
29 KiwiRob : There are, Osram, Philips & GE all have factories, plus there are multiple factories in China spewing out cheap LEDS.
30 sturmovik : Y'know, in case you need them, there are a few lighting shops in BLR that sell the warm coloured CFLs. But yeah, everyone uses the bluish lights. For
31 bristolflyer : Yep, it can sure be expensive. How about changing just the most regularly used fixtures? You'll get the best energy savings for your expenditure that
32 Braybuddy : They are similar to the one in the pic, only with small cylindrical contacts at the end of the pins. The LED bulbs that I tried had a similar life to
33 DocLightning : That makes more sense and that's the approach I'm taking. For certain applications in the house (four motion-sensing floods and the dimmable globes o
34 Post contains links GuitrThree : When I was in Hawaii this summer in an elevator, I looked up and noticed that the old fluorescent tubes where replaced with direct fit tubes of LED's
35 DocLightning : Actually, I think they're designed to slide right in without any modification. And because the LED's are spaced out, a huge heat sink is not necessar
36 nickh : I am slowly starting to replace my CFLs with incandescent-look-alike LED lamps - they have a "cleaner" ~3K color BUT - the transformers in the base (a
37 DocLightning : "Pure White" is a 5,000K or 6,000K bulb. While it's a perfectly good color to work under, it's not very relaxing.
38 DocLightning : Well, I ordered three 800 lumen LEDs for my own fixtures. They come in those annoying rigid plastic things that are impossible to cut open without rip
39 zippyjet : I've always been a fan of the less heat output the better. Even growing up in my parent's house which was mid 1950's tenement especially the bathroom
40 Klaus : That's because they're actually blue LEDs coated with a layer that converts some of the blue light into red and green (=yellow) which together with t
41 DocLightning : Yeah, I figured that out. I wonder how much. The current generation of LED lamps is typically advertised as lasting 2-3 decades. I do think that LED
42 L-188 : I have been switching over to CFL's as my old bulbs go out. The only exception are those lights that are on a dimmer switch, and in my unheated crawl
43 KiwiRob : All LEDS need a heat since, LEDS produce more heat than light. The really cool thing about LED is that the variety and form factor of lighting is goi
44 Klaus : No, that's the great thing about LEDs: Many smaller ones can be spaced out so that their regular mounting mechanism is already sufficient to dissipat
45 trvyyz : Do the LED lights need FDA approval? just curious.
46 KiwiRob : Which is acting as a heat sink, I see LEDS pretty much every day on account of working in a lighting factory and selling light. All of our LED produc
47 Klaus : When the distribution is wide enough, you could even suspend them in thin air and they would still not burn out. A high-power LED providing the same
48 DocLightning : Given that they are neither a food nor a drug, I can't imagine why they would.
49 Post contains images KingFriday013 : We have all different kinds of lighting in my home (old-school incandescent, fluorescent, CFLs, etc.)... but I think all but the bathrooms and maybe o
50 trvyyz : I guess they fall under Laser category Class I . There may be other regulations if not FDA, I believe.
51 Klaus : No. Lasers emit monochrome, coherent, tightly focused (actually, parallel) beams of light which is completely different from regular LED light, parti
52 DocLightning : I live in CA and our local big-box hardware store has CFL's in a variety of color temperatures ranging from 2700K to 6000K. You'd probably like 4000-
53 Post contains links trvyyz : Yes, technically they are not lasers but safety wise they are/were subjected to the regulations of laser. http://ledsmagazine.com/features/2/6/4 6082
54 Klaus : Interesting, but not really justified. This statement from the article sounds quite plausible: The difference between lasers and all other light sour
55 NoWorries : Another significant difference between LEDs and incandescent light is frequency range. Incandescent light tends to be spread out over a broad range wh
56 Klaus : Infrared or ultraviolet are separate cases since the human eye by definition (as in the "infra" and "ultra") cannot see those frequencies and cannot
57 DocLightning : Also, "UV" LED's are actually "near-UV." It's one of the applications where a fluorescent tube is clearly superior.
58 NoWorries : But the issue isn't visual response -- the risk is from physical damage due to reactions at specific frequencies -- an equal amount of energy in the
59 DocLightning : But within the visual light spectrum, LED's are no more capable of causing damage than incandescents. Frequency does make a difference, but not withi
60 Post contains images NoWorries : Yes, I agree. I'm trying to come up with some line of reasoning that would explain why a standards body would want to treat LEDs and lasers somewhat
61 Klaus : No, that is not true to my knowledge, and in both respects: First, physiological response is actually a critical concern here. It is the reason why i
62 DocLightning : Correct. One requires trichromatic vision to form a full-spectrum image. This is done by the brain integrating the different intensities from differe
63 Post contains links NoWorries : This wikipedia article illustrates the types of eye damage that can occur at various frequencies (yes we all know that lasers are more dangerous than
64 NoWorries : Exposing a chicken to 100 watts of incandescent light for a minute doesn't have the same effect as exposing a chicken to 100 watts of xrays for a min
65 DocLightning : We're talking about visible light here, not X-rays. X-rays are regulated differently.
66 NoWorries : Sure were talking about visible light here; again I'm just making the point that both frequency and total energy can affect how electromagnetic radia
67 Post contains links and images superfly : Incandescent light bulbs for me. I HATE CFL lights! Why on earth would anyone want their house to have comfort of a factory or the DMV? Incandescent l
68 DocLightning : That's why I'm transitioning to LED's. You can drop an LED from chest height and not only does it not break; it still works. Personally, I think the
69 Post contains images NoWorries : I was thinking Swiss (all the holes) ... That's a solid argument against any unexpected effects turning up -- a point which I thought I conceded in m
70 DocLightning : There are gaps AND spikes. Absorption AND emission.
71 okie : I started with LED replacements for Par 20's (50watts ea x 10) for the lights in the eve of the front of my home more than 5 years ago. They operate o
72 zippyjet : I just picked up a pair of 90 watt LED Indoor/Outdoor flood lamps for my front porch. They were Home Depot's house brand and do not have that "ET look
73 Post contains links ANCsupercub : All this conversation reminded me of a wimp video I watched the other day. http://www.wimp.com/futurebulb/
74 Post contains images OA260 : I changed last year to LED in 99% of the house inside and out. There was a deal at the local supermarket which had 50% off. I had bought a few online
75 flyingturtle : In my home (a three room apartment, if you also count the hallway and the kitchen), I have one bright CFL for each room, and additionally weaker ones,
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