I don't know if anyone has done this but I wanted to have the yellow fog light look that you see on Lexus' BUT I didn't want to buy yellow bulbs. Mainly because yellow bulbs seem to only come in 50Watt versions. (I don't feel like taking a chance with melting the fog light housing) So I applied a small $1.79 treatment...yellow lens repair tape. Tell me what you think. (BTW, they are still bright, in fact when you turn them on you can definintely notice a yellow light cast in front of the car.)