Those little fans make a lot of noise!! I've just put a pair on my low beam, at the first I thought it was the cooling fan from the radiator :/ ?Inspired by this thread I purchased a pair of LED headlights off Amazon that said they worked as DRLs and brights.
I went with the fan-cooling model, as I have another pair for my low beams and they work great.
Unfortunately, the fan is too big to get the bulbs installed even without the additional cover attached.
Heat sink versions are probably the way to go...