Service Guaranteed Industrial Grade HID lamps offer maximum energy efficiency, high light output, and extremely long life. Delivering far more light per watt than incandescent lamps, they can be use to achieve huge savings on electricity.

HID lamps work in a similar fashion to fluorescent lamps. Current flows between electrodes in an arc stream through a gas, causing it to give of light. Unlike fluorescent lamps, however, HID lamps are "point sources" of light, and can be used in fixtures that provide for "optical control," or focusing, of the light.

HID lamps have an inner build (the arc tube) and an outer envelope that maintains an insulated atmosphere around the arc tube. The lamp components are as shown: Graphite Base - Date coded with ANSI designation. Will not "freeze" or corrode in the socket, even after years of operation. Special silicone cement bonds to glass to ensue a reliable, permanent seal.

Unitized Mount Frame - Provides electrical connection and cushioned support for the arc tube. Service Guaranteed design minimizes number of welds to maximize lamp reliability.

Starter Electrode/Resistor - Designed and built to withstand shock, vibration, and high starting voltages. (Not required in HPS lamps).

Arc Tube Seal - One-piece, full-press construction seals end of the arc tube, dissipates electrode heat, and lengthens lamp life.

Arc Tube - The "light-producing" component. Contains metallic and gas vapors, as well as electrode assemblies. Service Guaranteed mercury vapor and metal halide lamps feature operation in any position, and a smaller, brighter light source.

Backwound Electrodes - The key to lumen maintenance, reliable starting and full lamp life. Service Guaranteed lamps are designed and built to provide long, reliable operation be retaining essential emissive coating.

Phosphor Coating - Selectively used to improve color and reduce surface brightness.

Outer Envelop ("Bulb") - Hard glass withstands thermal shock caused by rain and snow.

Oxidizable Tungsten Fuse (mercury vapor lamps only) - Protective circuitry prevents operation in event of outer envelop failure.