Another factor of the high-heat - even if only LED, the fans provide Ventilation - which is necessary - not for just heat, but when the LED gets up to operation temperature - the LED itself can emit a "stench" of hot epoxy plastic from being hot. The color they emit does take it's toll on the Epoxy used to seal it from the environment.
Same effects for running DUAL - Element High/Low beam single lamp Filament assembly. On vehicles, unless the Lamp holder assembly is thick gauge metal - they can't run dual filament on at once - it heats up the base to a point it will melt. It's why some vehicles use 9003 metal base versus the H9004 - the Plastic connector - and why many vehicles can only run so many watts of light thru their systems based upon the tungsten (Filament) 45 or 65 watts. The amps running thru the system can heat up the connector to a point where it melts.
The heat from the bulb can easily smoke stain the inside of a headlight housing rendering it's ability to offer a focused beam - totally useless due to the excessive heat smoking the inside of the lens and chrome plated plastic - unless it has a way to vent - that bulb will fog the inside of the housing making the headlamp less and less effective in producing a beam, more like a SoftWhite Light bulb of general illumination. It's worse in a Lexan plastic housing than the older Headlamp glass they used to operate with.
LED spectrum to give you this wattage level of brightness (Kelvin in Color temperature) is in the high energy Blue, Indigo and UV, which other coatings used as part of the reflector/sand grain housing - (Cathode end) are placed in the same "cup" they absorb then re-emit light in Red and Green to form Amber - which combines with the Blue main color and looks more Cyan. That is the phosphor - like RGB - in older TV's and currently in CFL's (that phosphor coating) - only nowadays they also use (additional) an Amber coating to help with full - color rendering - but that conversion comes at a price of heat lost - it has to go somewhere.
