CFR 91.209 states
No person may operate an aircraft that is equipped with an anticollision light system, unless it has lighted anticolision lights. HOWEVER the anticolision lights need not be lighted when the pilot in command determines that, because of operating conditions, it would be in the interest of safety to turn the lights off.
In the clouds who will see the rotating beacon? If they are that close it's to late..
The aircraft I retired from had strobe nav lites.
I have taken off with out landing lights although not a common practise, under conditions such as dense fog ie: 300 rvr or blowing snow will definately afford you more forward visibility and better direction control. Regards, Oldman
I made a mistake in the previous reply. The aircraft that I retired from did not have strobe (colored) nav. lites. Just strobe (white) flashers on the wing tips that were turned off in reduced vis at night. Sorry, Oldman
I have also taken off at night without using landing lights. Also, once inawhile, the "rotating" (most newer ones don't rotate anymore ) beacon does get annoying in reduced vis at night and I'll turn it off, though it doesn't happen very often.
No FL100, Are you joking, the PANS recommend that the transition altitude is the lowest possible altitude, but preferably not under 3000 ft. In Most countries, the transition alt. and thus also level is situated WELL below 10000ft.
By the way, ALWAYS put on your NAV lights for safety, do not depart (even in general aviation) without the Beacon light. Just plain sense and airmanship.
For the past while, AOPA has favored a concept called "operation lights on." Where all operational lights are turned on, including the nav and anti-collision, day or night. I think it's a great idea, except I think I'd still follow the rule where you only use your landing light within 10 NM of the airport during the day. Landing lights burn out easily, at least in the airplanes that I'm flying right now.