Last week another low-beam bulb burned out on my Subaru. I've had it since December 2015, and that was going to be the 4th set of headlights I've put into it since I bought it.
So I decided to give LED headlights a try. I bought a set of Lasfit CL6 H11s from Amazon for about $30. Good reviews, but not a lot of pertinent information on installation, potential issues, etc.
Well, they are a LOT bigger than the standard halogen bulbs. They have a large heat sink and a cooling fan on the back, and as I suspected, that was going to cause all sort of problems with the factory dust covers, as in... they're not going to fit back on. And even if they do, they won't allow the fan and heat sink to do with job.
So, another order to Amazon to buy rubber boot dust covers that will allow the heat sink and cooling fan to stick out the back of the boot and thus cool the bulbs properly.
They came yesterday, and were equally a huge pain in the ass to get installed properly, again because of the size of the bulb and also because of the very tight confines under the Forester's hood.
I finally got them in place (I think, I need to check to make sure they've not worked loose).
I REALLY like the light that these bulbs put out. They're 6000K color, which is really white, a lot whiter than the halogens I've been using. They're also 7,600 lumens (3,800 lumens per bulb), while most halogen headlight bulbs only produce in the 2,800 lumen range.