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candela (= lumen per steradian) cd (= lm/sr) J: Luminous flux per unit solid angle: Luminance: L v: candela per square metre: cd/m 2 (= lm/(sr⋅m 2)) L −2 ⋅J: Luminous flux per unit solid angle per unit projected source area. The candela per square metre is sometimes called the nit. Illuminance: E v: lux (= lumen per square metre) lx (= lm ...
[2] [3] [4] The most efficient commercially available LED lamps have efficiencies exceeding 200 lumens per watt (lm/W) and convert more than half the input power into light. [5] [6] [7] Commercial LED lamps have a lifespan several times longer than both incandescent and fluorescent lamps.
Efficiency: LEDs emit more lumens per watt than incandescent light bulbs. [63] The efficiency of LED lighting fixtures is not affected by shape and size, unlike fluorescent light bulbs or tubes. Size: LEDs can be very small (smaller than 2 mm 2 [64]) and are easily attached to printed circuit boards.
A 470-lumen LED lamp. It consumes about one sixth the electrical power of an incandescent light bulb producing the same light. Lamps used for lighting are commonly labelled with their light output in lumens; in many jurisdictions, this is required by law. A 23 W spiral compact fluorescent lamp emits about 1,400–1,600 lm.
Cree Reaches LED Industry Milestone with 200 Lumen-Per-Watt LED New XLamp MK-R LEDs Deliver Record-Breaking Efficacy and Next-Generation Price-Performance for LED Arrays DURHAM, N.C.--(BUSINESS ...
Orion's LED fixtures use 123 watts compared to 400-watt HIDs and 298-watt fluorescents. Orion's superior optical design incorporates different lens combinations to optimize light output for ...