Originally Posted by ans2k
thicker isnt always better, i remember reading that if it is too thick, the film could retain heat and cause stress fractures.
Interesting. I wasn't familiar with the Headlight Armor brand, so I went to their web site. They have this note, in bold red (typos and bad grammar are not mine):
Please Note: New car manufacturers warn you about not replacing any of your bulbs with higher wattage versions, and so do we. Higher wattage bulbs may cause reflector / lens / housing failures even without these covers,. As using these covers, may decrease the lens ability to dissipate heat more applicable to fog lights than to headlights- we also recommend that you refrain from using higher wattage bulbs in conjunction with our high performance covers,. We also suggest turning you fog lights off while you vehicle is stationary stuck in stop and go traffic for example.