Quartz Light – Can also be called halogen light or tungsten light. A quartz light is a very bright type of light that uses a tungsten filament that is contained in a quartz envelope. The color temperature will be a fairly consistent 3,200K. They can get very hot when in use. It is also very important never to touch the bulb with your bare hands at any time. Oil from your hands will cause the bulb to blister and explode.