Sorry, I know there are tons of LED posts but I can't find an answer anywhere. I'm looking to replace my standard halogen with LED. There is limited space in the headlight housing for bulbs, and I assume that not all LEDs will fit with the fan/heatsink. What is the max bulb length that I should be looking at? If there's not a length that anyone can quote, can someone give me a brand that did or didn't fit with the dust cover on? Thanks!