FWIW, I added the halogen back-up lights about a year ago and haven't noticed any problems with heat on the lenses so far. Considering the short amount of time that there on I don't think it's going to have much affect. Mike Atkinson vin 16232 Subject: [DML] Re: Intermittant lights I too have thought of adding halogen back-up lights but considering the heat generated by them has kept me from doing it. Please keep the list informed as to how the taillight lenses tolerate the extra heat. David Teitelbaum vin 10757