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Beam spreads are designated as FL , SP , NSP (narrow spot), and VNSP (very narrow spot), as stamped on the back of the lamp's reflector. PAR38 lamps, with an E22 base and with ratings up to 150W, were often used for domestic outdoor floodlight illumination for patios, backyards, and often combined with a PIR sensor switch as a security ...
These lamps use a bi-pin connector for power: 12-volt MR11 bulbs usually use a GU4 base, and 12-volt MR16 bulbs usually use a GU5.3 base. The common 12-volt MR16 lamps, therefore, require a ferromagnetic or electronic transformer —sometimes misnamed as a ballast —to convert the 120- or 230-volt mains voltage to the extra-low voltage ...
A top most number as 1 indicates a high beam lamp and a 2 indicates a low or twin beam lamp. Only 5.75' lamps were high or low beam, whereas 7' lamps were twin beam lamp with the 2 on the top most edge of the headlight. About 1967, American Motors Corporation had Tung-Sol headlights on all their passengers vehicles up to October 1974 data.
The length (sometimes also referred to as "height") of any two-ended cylindrical bulb must be specified separately from its form factor code, usually in millimeters, as must the lamp's voltage and wattage— hence, T3 120 V 150 W 118 mm means a double-ended tube-shaped bulb with a diameter of 9.5 mm (3 ⁄ 8 in) that operates at 120 V and is ...
Weatherproof casings are available for outdoor spot and flood fixtures. 120 V sizes: PAR 16, 20, 30, 38, 56 and 64 230 V sizes: PAR 16, 20, 30, 38, 56 and 64 Available in numerous spot and flood beam spreads. Like all light bulbs, the number represents the diameter of the bulb in 1 ⁄ 8 of an inch. Therefore, a PAR 16 is 51 mm (2 in) in ...
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The luminous intensity (in candelas) is a measure of how bright the beam in a particular direction is. If a lamp has a 1 lumen bulb and the optics of the lamp are set up to focus the light evenly into a 1 steradian beam, then the beam would have a luminous intensity of 1 candela. If the optics were changed to concentrate the beam into 1/2 ...