Shat-R-Shield® 94600S Metal Halide Lamp, 320 W, Metal Halide Lamp, EX39 Exclusionary Mogul Lamp Base, BT28 Shape, 21000 Lumens

Shat-R-Shield high intensity discharge (HID) lamps are designed to be safely used in open fixtures and are excellent for lighting large areas. In addition to offering greater flexibility in system design, open fixtures are less expensive and more compact than enclosed fixtures. The lenses on enclosed fixtures can reduce light output by up to 10% (compounded over time by the build-up of dirt, insects and other debris on the lens).