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Lights & lighting
Any device used for illumination, either for practical use or deliberate aesthetic effect.
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Lights & lighting > Lighting products 
glare
Lights & lighting; Lighting products
Visual discomfort caused by excessive brightness is called discomfort glare. If task performance is affected it is called disability glare. Glare can be direct glare or indirect ...
halogen lamp
Lights & lighting; Lighting products
A halogen lamp is an incandescent lamp with a filament that is surrounded by halogen gases, such as iodine or bromine. Halogen gases allow the filaments to be operated at higher ...
harmonic
Lights & lighting; Lighting products
An integral multiple of the fundamental frequency (60 Hz) that becomes a component of the current.
harmonic distortion
Lights & lighting; Lighting products
Distortion of an AC waveform caused by multiples of the fundamental frequency (harmonics). Odd triplet harmonics (thirds, ninths, etc.) may result in large currents on the neutral ...
hertz (Hz)
Lights & lighting; Lighting products
Unit used to measure frequency of alteration of current or voltage
high efficiency (energy saving) electromagnetic ballast
Lights & lighting; Lighting products
Ballast with core & coils, designed to minimize ballast losses compared to the "standard" ballast.
high intensity discharge (HID) lamp
Lights & lighting; Lighting products
A general term for mercury, metal halide (GE ConstantColor® CMH®, Multi-Vapor®, MXR or Arcstream®) and high-pressure sodium (GE Lucalox®) lamps. HID lamps contain compact arc ...
Sub-categories
- Indoor lighting (47)
- Lighting accessories (13)
- Lighting bulbs & tubes (94)
- Lighting products (8932)
- Outdoor lighting (67)
- Portable lighting (9)