I just installed (2) dual 175watt retrofit kits with reflectors.
(Balast, Sockets, reflector)
I'm using 4 Venture 10000k bulbs.
They work fine, very slight buzzing sound at the balast.
Only thing is the balast box gets very hot (ain't cool to the touch
) and I'm thinking of cutting openings in them to install computer cooling fans.
But for now, no complaints and the quick connect cords are very cool for installation etc..
Best price I've found.