| 2G11 - 4 pin straight configuration for
compact fluorescents |
| Actinic - Blue spectrum of light that peaks
in the 420 nanometers range |
| ANSI - American National standards Institute |
| Arc Tube - Sealed tube within a metal halide
bulb where light is generated |
| Ballast - A coil that regulates the power
going to the bulb |
| BU - Base up. Refers to the burning position
of a metal halide |
| Color Rendering Index (CRI) - Measures
the color rendering ability in comparision to natural
sunlight |
| DE - Double-ended, Refers to HQI metal
halides |
| E39 - Standard mogul base |
| GX23 - 2 pin configuration for compact
fluorescents |
| GY10Q - 4 pin square configuration for
compact fluorescents |
| HID - High intensity discharge |
| HO - High output, usually refers to fluorescents |
| HPS - High Pressure Sodium |
| HQI - Commonly refered to as double-ended
metal halide bulbs |
| Ignitor - Generates pulses of voltageto
start a lamp |
| Initial Lumens - Light output of a bulb
at 100 hours or operation |
| Lumen - Measures light output |
| Kelvin - Scale used to measure the color
of light |
| Medium Base - E26 base, similar to household
incandescents |
| MH - Metal halide |
| MV - Mercury vapor |
| Mogul - E39 base, standard base for metal
halides |
| Nanometers - Used to measure wavelengths
in the electromagnetic spectrum |
| NO - Normal output, standard output fluorescents |
| PC - Power compact, same as compact fluorescent |
| Probe Start - Bulb that uses a starting
electrode |
| Pulse Start - Bulb that uses an igniter
in conjunction to the ballast to start the bulb |
| SE - Single-Ended |
| U - Universal, refers to the burning position
of a metal halide |
| VHO - Very high output |
