a380heavy
Posts: 237
Joined: Sun Mar 05, 2006 3:01 am

Dimming Cabin Lights On Take Off

Tue Jun 20, 2006 7:32 am

I sincerely apologise if this has been discussed before (in an attempt to stop any flaming before it starts!).  Smile

Why is it that some airlines tell the passengers that is company policy to dim the cabin lights for take off?

What is the reason for dimming the lights?

Regards,

A380Heavy
Flown in:732,733,734,738,742,752,763,772,F27,DC9,MD-11,A300,A332,ATR72,DHC-6,Bell206,C172,Auster,PA-28
 
HPRamper
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RE: Dimming Cabin Lights On Take Off

Tue Jun 20, 2006 7:33 am

I've wondered the same. Or right at pushback when all the lights are temporarily cut.
 
OV735
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RE: Dimming Cabin Lights On Take Off

Tue Jun 20, 2006 7:37 am

I believe it's for passengers' safety. By switching off (well, dimming) the artificial light and keeping the window covers up, your eyes can adapt to the natural light outside the aircraft, which is handy when something out of the ordinary happens and the aircraft has to be evacuated.

That's what my own logic tells me. Somebody please correct me if I'm wrong.

Cheers,
OV735
 
jfrworld
Posts: 367
Joined: Thu Aug 19, 2004 8:21 am

RE: Dimming Cabin Lights On Take Off

Tue Jun 20, 2006 7:41 am

Quoting OV735 (Reply 2):
I believe it's for passengers' safety. By switching off (well, dimming) the artificial light and keeping the window covers up, your eyes can adapt to the natural light outside the aircraft, which is handy when something out of the ordinary happens and the aircraft has to be evacuated.

I've heard this as well, although I was on a UA flight from JFK-SFO and they didn't dim the lights until the movie started after about 45 minutes after takeoff. This was during the day.
 
mbg
Posts: 52
Joined: Mon Nov 21, 2005 11:18 am

RE: Dimming Cabin Lights On Take Off

Tue Jun 20, 2006 7:41 am

Quoting OV735 (Reply 2):

I think you are right on the spot. I wondered the same question until I read something of that sort here a while ago.

Cheers,

mbg
 
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jetjack74
Posts: 6585
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RE: Dimming Cabin Lights On Take Off

Tue Jun 20, 2006 7:43 am

Quoting A380Heavy (Thread starter):
What is the reason for dimming the lights?

Here in the US, we dim the cabin lighting for take-off because at night time, you risk night blindness if you're exposed to prolonged artificial light in the event of an cabin egress/evacuation. And we transfer this logic over to daytime flights to keep these procedures uniform. This is a company policy, it's not an FAR(Federal Aviation Regulations) or FAA-mandated policy. I don't know what the CAA in Europe requires.

Quoting HPRamper (Reply 1):
I've wondered the same. Or right at pushback when all the lights are temporarily cut.

That's when go from ground power to when you spool up APU/Engines to run the interior lighting/cabin systems
Made from jets!
 
SoBe
Posts: 184
Joined: Fri Oct 08, 2004 12:11 am

RE: Dimming Cabin Lights On Take Off

Tue Jun 20, 2006 7:47 am

An oldie but a goodie.
Why Are Lightsin Cabin Turned Off During Take Off? (by RootsAir May 16 2006 in Civil Aviation) Why Do They Dim The Lights On T/o And Landing (by Vimanav Jul 31 2003 in Civil Aviation) Lights Dimmed For Takeoff (by James768 Dec 28 2000 in Civil Aviation) Dim The Lights (by Zrh Feb 8 2000 in Civil Aviation) Dimming Cabin Lights (by Excelsior767 Sep 27 1999 in Civil Aviation) RE: Dimmed Cabin Lights At Take-off (by L1011 Jun 11 2000 in Civil Aviation) 3 Questions For Cabincrew (by BRUspotter Jan 9 2004 in Civil Aviation) RE: Cabin Lights During Night Flights (T/O & Landings) (by Mutu Apr 1 2006 in Tech Ops) RE: Window Shades Must Be Up For Takeoff And Landing (by MMEPHX Jun 8 2004 in Tech Ops) Nightime Takeoff/landings (by Bigtop Jun 27 2000 in Tech Ops)
 
n8076u
Posts: 419
Joined: Mon Jun 19, 2006 10:52 am

RE: Dimming Cabin Lights On Take Off

Tue Jun 20, 2006 7:48 am

For the passengers and the crew to get more accustomed to the dark, in case of an emergency and all power is lost.

As for the lights going off then back on just before/during/after pushback, that occurs anytime they switch between sources of power, those being ground electrical power, APU electrical power, or engine electrical power.

Chris
Don't blame me, I don't work here...
 
TG992
Posts: 2310
Joined: Tue Jan 09, 2001 12:03 pm

RE: Dimming Cabin Lights On Take Off

Tue Jun 20, 2006 1:03 pm

Three main reasons:

1) The eye-adjustment to outside conditions, as mentioned above.
2) To enable passengers and crew to get a full view of what's going on outside in the event of evacuation (as some windows may have disappeared or become damaged in the event of an accident)
3) To enable rescuers to see inside the cabin.
-
 
SoBe
Posts: 184
Joined: Fri Oct 08, 2004 12:11 am

RE: Dimming Cabin Lights On Take Off

Tue Jun 20, 2006 1:15 pm

Quoting RamerinianAir (Reply 8):
I don't know where A.net would be without you!!!

It would be right here still filled to the brim with sarcastic children like you.

Quoting RamerinianAir (Reply 8):
I hope you enjoyed wasting your time with those links.

Took me all of 5 minutes.

I did not flame the original poster or say anything derogatory. With so many topics going back years is it not possible that some good info might have been posted? For the most part I see "Why, I wondered, I think, I heard, I believe"

[Edited 2006-06-20 06:16:50]
 
GQfluffy
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RE: Dimming Cabin Lights On Take Off

Tue Jun 20, 2006 1:23 pm

Quoting HPRamper (Reply 1):
Or right at pushback when all the lights are temporarily cut.



Quoting Jetjack74 (Reply 5):
That's when go from ground power to when you spool up APU/Engines to run the interior lighting/cabin systems

Or maybe when they switch from APU power to power generated by the engines...
This isn't where I parked my car...
 
bohica
Posts: 2308
Joined: Tue Feb 10, 2004 3:21 pm

RE: Dimming Cabin Lights On Take Off

Tue Jun 20, 2006 1:25 pm

With the cabin lights dimmed, it's easier to see the emergency floor lights in case of an evacuation.
 
a380heavy
Posts: 237
Joined: Sun Mar 05, 2006 3:01 am

RE: Dimming Cabin Lights On Take Off

Tue Jun 20, 2006 4:23 pm

Quoting SoBe (Reply 10):
I did not flame the original poster or say anything derogatory. With so many topics going back years is it not possible that some good info might have been posted? For the most part I see "Why, I wondered, I think, I heard, I believe"

SoBe, thank you for not flaming me and for going to all the trouble you have in researching this subject.

It is now very evident that this topic has been discussed in detail several times, but due to all the replies, at least I feel better knowing that I wasn't the last person on the planet wondering "why do they do that?"

Best regards,

A380Heavy
Flown in:732,733,734,738,742,752,763,772,F27,DC9,MD-11,A300,A332,ATR72,DHC-6,Bell206,C172,Auster,PA-28
 
jorge1812
Posts: 2911
Joined: Mon Apr 19, 2004 9:11 pm

RE: Dimming Cabin Lights On Take Off

Tue Jun 20, 2006 6:53 pm

Quoting SoBe (Reply 6):

Good one!

Quoting Bohica (Reply 12):
With the cabin lights dimmed, it's easier to see the emergency floor lights in case of an evacuation.

Yes, that's the reason my Girlfriend (F/A) told me.

Quoting RamerinianAir (Reply 8):
SoBe,
THANK YOU!!! Thanks soooo much. I don't know where A.net would be without you!!!
I hope you enjoyed wasting your time with those links.

Such a childish comment, why do you bother about peolple helping without being as "kind" as you are?

Georg
 
IFly4UAL
Posts: 63
Joined: Mon Sep 04, 2000 8:30 am

RE: Dimming Cabin Lights On Take Off

Wed Jun 21, 2006 3:19 am

Actually, the lighting conditions inside the cabin should mirror the lighting conditions outside, so that your eyes should not have to adjust to different lighting conditions in the event of an evacuation. Consider this: Stand in a brightly lit room at night with only moonlight shining through a window, then turn the lights off. See how long it takes your eyes to adjust to enable you to make out the shapes of the furniture in the room. It's the same concept. Therefore, the only time the lights SHOULD be dimmed or off is at night, but somehow flight attendants have slipped into the habit of turning the lights down/off all the time, day or night.
BGR--Vacation Spot for All the Flying Crazies
 
baguy
Posts: 474
Joined: Wed Mar 15, 2006 11:04 pm

RE: Dimming Cabin Lights On Take Off

Wed Jun 21, 2006 4:40 am

On an Excel Airways flight they told me it was aviation safety rules.