One of my halogen 9005 high beams has burned out, so it's time to pull the front end of the car apart
to replace the high beams. I was looking at going to 100W halogen bulbs, but having looked at the wiring in the headlight (I have my broken PS headlight on hand from an accident last year) I'm not sure that would be wise.
So I'm now I'm thinking of trying out the LED bulbs. I just wish (1) they weren't so expensive compared to halogen bulbs, and (2) it wasn't so damn hard to swap out bulbs on these cars. (That latter point is the more important one - takes away from my motivation to experiment with the bulbs.) Anyway, one thing I was wondering about was the cooling aspect - I think there's room for the different heat sink designs (and since the 9005 bulb is the twist-to-lock-in style, I don't think getting the bulb properly seated would be an issue, as it was with WesH8398). However, if the heat sink is inside the headlight housing I wouldn't think it's going to do much good - no airflow, small volume of air to take away the heat. The various Ebay listings don't say anything about that, but I noticed all the LED bulbs on vleds.com have this image:
Makes sense. Of course, that then begs the question - what do I risk if I leave the cap off the back of the headlight housing to allow the heat sink to do its job? Or maybe drill some holes in it to allow some air to flow?