Those who have the projector type of headlights might want to look into using HIDs instead of LEDs to avoid having to accomodate for the large heatsinks or fans or what have you. Furthermore, in my opinion, using LEDs with the fans for heat dissipation might have long term detrimental effect. The heat that the fan is trying to blow out circulates within the headlight housing unless you have modified the rubber covering so that the fan blows the air outside. If the hot air is circulating within the housing, then overall, the housing starts to get warmer than normal and the dissipation process is drastically reduced since all it is doing is drawing hot air from the LED and then having hot air circulating over the LED. I cannot say for sure, but just my opinion.