anyone know a cheap way to make a reflector for an HID light? can ducting work? or is it just better to buy one?
i would recommend that you just buy one. the reflectivity will be greater and they are engineered to disperse the light evenly over a large area. i have seen people just bend sheet metal and rivet on a socket to use reflectors though. check out the DIY forum, they might be able to better assist you.