Eh ???????
You've got to be kidding me. :o
One of the advantages of HID is how much cooler they are than conventional halogen globes. It's part of the reason why they last thousands of hours longer.
There are many vehicles out there in which you have to be careful if you upgrade the halogen globes to higher than original wattage. Modern plastic lenses can in some cases be burnt, and some plastic formed reflectors can melt (I've personally had this happen in an XF Falcon). Using HID instead of higher power halogen globes virtually eliminates this problem - and produces a far superior light output.

