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Amount of light (luminous energy, Q)
Luminous quantity (Q) is a measure of the total light emitted from a light source over a given period. It is the...
Read moreObie light (eye light)
Obie lighting refers to a technique used in film and video production to create a light reflection in an actor's eyes ,...
Read moreOne-K lamp
One-K is a term often used in theatrical and film lighting , and refers to a specific type of bulb with an...
Read moreLighting Effectiveness Factor (LEF)
The Lighting Effectiveness Factor (LEF) is a measure of the efficiency and effectiveness of a lighting system , taking into account the...
Read moreLighting Cooling Index (LCI)
The Lighting Cooling Index (LCI) is a measure of the coolness of a light source. This index helps determine the color temperature...
Read moreLuminaire Dirt Depreciation (LDD)
Luminaire Dirt Depreciation (LDD) is a factor that takes into account the decrease in light output due to dirt, dust and the...
Read moreLight Loss Factor (LLF)
The Light Loss Factor (LLF) is a correction factor that accounts for the loss of light output over the life of a...
Read moreMaximum Overall Length (MOL)
The Maximum Overall Length (MOL) is the total length of a lamp , measured from the very tip of the lamp (e.g....
Read moreLight Center Length (LCL)
The Light Center Length (LCL) is the distance from the center of the light source to the base of the lamp ....
Read moreKlieg lamp
A Klieg lamp is a powerful carbon arc lamp originally used in the film industry for lighting during filming. The lamp is...
Read moreKoschmieder's law
Koschmieder's law describes the relationship between visibility and the atmospheric extinction coefficient. This law states that visibility is inversely proportional to the...
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