What is Instant Start Lamp?

A light source that generates light utilizing a thin filament wire (usually of tungsten) heated to white heat by an electric current passing through it.

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Illuminance MeterA device that measures the illuminance at a location calibrated either in footcandles or in lux. Also know as a light meter

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Atmosphere refers to the type of gas or vacuum filling a volume or chamber of the lamp. This chamber might contain a filament or it might refer to the bulb which contains the arc tube.

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A 13-watt compact fluorescent has comparable light output to a 60-watt incandescent bulb. An 18-watt compact fluorescent has comparable light output to a 75-watt incandescent bulb. Fluorescent bulbs operate cooler, use less energy, and last about 5 times longer.

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Filaments are designed to get to operating temperature when an appropriate voltage is applied, e.g. 120 volts or 12 volts in the case of incandescent lamps or MR16 lamps. In certain fluorescent lamps the filament voltage is the low voltage applied to the cathode to energize it for electron emission.

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