I'm currently running Osram 100W bulbs, and they perform well, but I'd like to increase the output and reduce power consumption if I can. DDM has a kit that's very cheap, and I'm using one of their setups in a searchlight, so I know they work.
My questions are whether the bulb will fit inside of the housing, since it's very thin and doesn't seem to have much clearance between the halogen bulb and the glass lens. Also what it will do to the beam pattern. They're obviously designed for halogen, and the 100W bulbs produce a nice wide beam with their longer filaments. Is the HID going to absolutely ruin the beam?