Headlight upgrade 940

[Laird Scooby]

Originally Posted by classicswede

I have been using French yellow bulb covers for years. I find them far better for night driving and everything looks much clearer with them. Other drivers who have used my car all commented on how good the lighting is (340 and 240) but with the V90's using H1 ones not had a cover for them so been back to "normal" lighting for a while

You're putting the yellow covers in the wrong place - they should be on your eyes! Seriously, amber/yellow night driving glasses can improve vision but yellow bulbs won't. It's all to do with the wavelength of the light and where it's filtered into yellow. I'm not an optician so don't fully understand that bit just know it's a proven fact.

Using yellow light bulbs can hide certain things in the way blue lights are used in public toilets in supermarkets and other places - it prevents junkies from finding their veins so they can't shoot up in the heads. Given many road markings are in yellow or off-white that is almost yellow, that could be a problem!