As an aside, Ive been running a pair of 100 watt HID’s in my pickup truck driving lights (Hella Ralley 4000 with 9” reflectors) for nearly 4 years without incident. They have many hours of sustained use in a high vibration environment, which would kill most Chinese HID systems. This particular design is highly touted on 4x4 forums and has given others good results as well. Your thread reminded me of another pair of Hella 4000’s I picked up and forgot about, so I just ordered another 100W HID kit to convert them as well. They provide around 9000 lumens each, have ceramic mounting bases and very high quality ballasts that dont flicker and always ignite. Ive tested mine down to –4 F. Im told that the ceramic base 70 watt HID bulb can be used with the 100 watt ballast for higher surface brightness in a smaller envelope. This should translate to a more concentrated beam in your deep reflector for longer range but with less total lumens. Perhaps the best part is that the kit is only $70 for a pair of them (with free shipping). You could use your spare HID and convert a Coleman spotlight like the one I did a while back. Then you could have a killer thrower with your project and a cheap medium thrower for your car that would still slaughter anything LED. I went with 4300k (appears to be about 1A Cree tint) for max lumens and H1 bases to match the Hella 4000’s and the Coleman spotlight. 100 watt HID sales link (only 2 days left) Id stay away from the other Chinese 100 watt versions because they have been notorious to failure and being underpowered. The link does a good job of explaining the differences in the electronics. You might also ask about higher wattage ballasts and 70 watt blubs… if you’re interested.