Before I had a car with automatic daytime running lights (05 Corolla), I
routinely turned on my headlights during the day. DRLs are mandatory in
Canada and many other countries. Motorcyclists keep their headlights on
during the day to enhance visibility. The "camouflage" theory is faulty.

Apples and oranges. On the ground, a landing light (or headlights)
will probably enhance visibility, even in the daytime. (Although, as
other posters have noted, not all the time.)

In the air, though, it's not so cut and dried. I found this on a
military history website:
************************************************** ******************
The post-war period saw interest in naval visual stealth and camouflage
declined further, although one USN initiative is worth analysis.
Codenamed 'Project Yehudi', this 1940's programme adapted contrast
lighting techniques experimented with during the First World War. By
attaching bright light sources to the outside of RN corvettes and the
Royal Canadian Navy vessel HMCS Trillium, First World War-period
technicians had sought to eliminate silhouetting effects.

The technique worked best during periods of haze, but changeable
weather meant that it was only effective for seconds at a time and was
negated by movement of the vessels. 'Project Yehudi' revived this
'active camouflage' principle by modifying TBM-3 Avenger and B-24
Liberator anti-submarine patrol and attack aircraft with similar
lighting schemes.
************************************************** ******************

So, I guess it all comes down to this: Are the benefits derived from
flying around with your landing light(s) on greater than the problems
encountered when you try to land at night with burnt-out landing light
bulbs?

:-)

(Must be why Lopresti can sell those danged Boom Beams for a grand!)
--
Jay Honeck
Iowa City, IA
Pathfinder N56993
www.AlexisParkInn.com
"Your Aviation Destination"