Lights & lighting

Lights & lighting

Any device used for illumination, either for practical use or deliberate aesthetic effect.

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Lights & lighting > Lighting products

distance between legs

Lights & lighting; Lighting products

For U-shaped Fluorescent lamps, this measurement is the average distance between the inner walls of the legs.

distance outside legs

Lights & lighting; Lighting products

For U-shaped Fluorescent lamps, this measurement is the average distance to the outside of each leg.

eccentricity (maximum)

Lights & lighting; Lighting products

In High Intensity Discharge lamps the Bulb to Arc Angle is the angle off of center between electrodes and bulb. The Bulb to Base Angle is the angle off of center that the bulb is ...

efficacy

Lights & lighting; Lighting products

A measurement of how effective the light source is in converting electrical energy to lumens of visible light. Expressed in lumens-per-watt (LPW) this measure gives more weight to ...

efficiency

Lights & lighting; Lighting products

The efficiency of a light source is simply the fraction of electrical energy converted to light, i.e. watts of visible light produced for each watt of electrical power with no ...

electrical discharge

Lights & lighting; Lighting products

A condition under which a gas becomes electrically conducting and becomes capable of transmitting current, usually accompanied by the emission of visible and other radiation. An ...