- 行业: Energy
- Number of terms: 8202
- Number of blossaries: 3
- Company Profile:
American conglomerate currently ranked by Forbes as the world's largest company. GE has multifarious business interests including power generation and financial services.
Device in ballast that stores electrical energy. Often used for power factor correction and lamp regulation.
Industry:Lights & lighting
Number of product units packed in a master case. Also known as Standard Package Quantity.
Industry:Lights & lighting
Metal filaments that emit electrons in a fluorescent lamp. Negatively charged free electrons emitted by the cathode are attracted to the positive electrode (anode), creating an electric current between the electrodes.
Industry:Lights & lighting
Resistance of the cathode in a Fluorescent lamp. It is measured "cold" before the lamp is turned on (Rc) or "hot" after the lamp is turned on (Rh). The ratio of the hot resistance to the cold resistance is also measured (Rh/Rc).
Industry:Lights & lighting
Refers to the luminous intensity at the centre of the beam of a blown or pressed reflector lamp (such as a PAR lamp). Measured in candelas.
Industry:Lights & lighting
Measure to identify the colour of a light source, typically expressed as (x,y) coordinates on a chromaticity chart (See colour TEMPERATURE).
Industry:Lights & lighting
A system for measuring the colour of the light emitted from a light source--either a primary source like a lamp or a secondary source like an illuminated object. Usually two numbers, x and y coordinates ranging from 0 to 1 specify the chromaticity.
Industry:Lights & lighting
In general lighting calculations, the fraction of initial lamp lumens that reach the work plane. CU is a function of luminaire efficiency, room surface reflectances and room shape.
Industry:Lights & lighting
Windings of copper or aluminium wire surrounding the steel core in ballast. Also refers to the entire assembly comprising the inductor or transformer.
Industry:Lights & lighting
