able to decompose or break down through natural bacterial action; Substances made of organic matter are biodegradable.

bound, stifled or inhibited from normal growth, by the confines of a container: Root systems become pot bound.

The unit used to measure the strength of an electric current.

The luminous discharge of electricity between two electrodes in HID lighting.

A transfer of electricity across two electrodes (anode and cathode), characterized by high electrode current densities and a low voltage drop at the electrode.

The enclosure which contains the luminous gases and also houses the arc.

An auxiliary piece of equipment designed to start and to properly control the flow of power to gas discharge light sources such as fluorescent and high intensity discharge lamps. In metal halide systems, it is composed of the transformer, capacitor and connecting wiring; sodium systems require an igniter in addition to the transformer and capacitor [..]

An industry code indicating that the bulb is to be operated only in a base up position.

The glass outer envelope component of an HID lamp which protects the arc tube.

The temperature at the bulb wall of a lamp, which effects lumen output and input wattage and which is important in lighting calculations.