PC Paul wrote:
LED lights weren't allowed until fairly recently, IIRC. Now they are even
used for pressure sensitive brake lights. Damn good idea.

They can be bought for cars, etc. What are the regulations
on these (cluster) lamps (they can be much brighter than
incandescent lamps)?

Add a double flashing hazard light for when you can only see one on a parked
up truck and we're getting somewhere.

Hm.