100 Watt Standard A-Type Incandescent Light Bulbs
Incandescent light bulbs come in a range of shapes and sizes. The most common is the A Shape Light Bulb, Many of these shapes have a designation consisting of one or more letters followed by one or more numbers, e.g. A55 or PAR38. The letters represent the shape of the bulb. The numbers represent the maximum diameter, in eighths of an inch.
Incandescent light bulbs are usually marketed according to the electrical power consumed. This is measured in watts and depends mainly on the resistance of the filament, which in turn depends mainly on the filament's length, thickness, and material. For two bulbs of the same voltage, type, color, and clarity, the higher-powered bulb gives more light.
Most store bought light bulbs only last 750 hours, but Lighting Supply Warehouse Light Bulbs have a Average Rated Life of 2,000 hours or more!
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