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Lighting products
Industry: Lights & lighting
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Lighting products
Input voltage
Lights & lighting; Lighting products
Power supply voltage required for proper operation of fluorescent or HID ballast.
Input watts
Lights & lighting; Lighting products
The total power input to the ballast which includes lamp watts and ballast losses. The total power input to the fixture is the input watts to the ballast or ballasts and is the value to be used when ...
Instant start
Lights & lighting; Lighting products
Lamp starting method in which lamps are started by high voltage input with no preheating of lamp filaments. Some rapid start lamps are designed so that they may be instant started. (See RAPID START).
Instant start lamp
Lights & lighting; Lighting products
A fluorescent lamp, usually with a single pin at each end, approved to operate on instant start ballasts. The lamp is ignited by a high voltage without any filament heating.
Integral
Lights & lighting; Lighting products
A popular term for a compact fluorescent lamp which includes a built-in ballast (See CFL).
Inverse square law
Lights & lighting; Lighting products
Formula stating that if you double the distance from the light source, the light level goes down by a factor of 4, if you triple the distance, it goes down by a factor of 9, and so on.
Isocandela plot
Lights & lighting; Lighting products
A plot with lines connecting points of equal luminous intensity around a source.
