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mespilus
Dammit
The dipped beam are Litronic, so a HID type bulb which sits behind a big glass lens.
The main beam is a 55w halogen bulb, and the parking lights are LED.
Of that lot I'd think that the main beam would generate the most heat - but would only be used when the car was in motion, and as they're at the front of the car they're air cooled.
The guides that tell you how to get the main lens off say to put them in the oven at ~100 degrees centigrade to soften the glue off before prying the lens away from the main body of the light.