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What is Color Rendering Index (CRI) ?

Color Rendering is an international system used to rate a lamp's ability to render an objects color. The higher the CRI (based upon a 0-100 scale) the richer colors generally appear. CRI ratings of various lamps may be compared, but a numerical comparison is only valid if the lamps are close in color temperature. CRI differences among lamps are not usually significant (visible to the eye) unless the difference is more than 3-5 points.


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What is Light Center Length? (LCL)

The distance between the center of the filament, or arc tube, and a reference plane - usually the bottom of the lamp base. Refer to the following chart for reference plane locations. Base type L.C.L Reference Plane Location All screw bases (except Mini-Can) Bottom of base contact Mini-Can Where diameter of ceramic base insulator is .531 inches 3-Contact Medium Bottom of base contact Mogul Medium Prefocus Top of base fins Mogul Prefocus Top of base fins Medium BiP...

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What is the filament Design?

Filaments are designated by a letter combination in which C is a coiled wire filament, CC is a coiled wire that is itself wound into a larger coil, and SR is a straight ribbon filament. Numbers represent the type of filament-support arrangement.

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What is a Dichroic Reflector?

A reflector (or filter) that reflects one region of the spectrum while allowing the other region(s) to pass through. A reflector lamp with a dichroic reflector will have a "cool beam" i.e. most of the heat has been removed from the beam by allowing it to pass through the reflector while the light has been reflected.

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What exactly is a kilowatt? (kW)

The measure of electrical power equal to 1000 watts.

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What does Cathode mean?

A Cathode is a metal filament that emits 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.

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