400W GES Tubular Clear WDL Metal Halide 3,000K - Works on MH and HPS Control Gear

These bulbs require either Metal Halide or High Pressure Sodium control gear.
They can require between 2 to 10 minutes to cool before re-striking.
Please not different brands can a have a different internal structure

CHH400/TT/UVC/U/830/E40