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Paragon Lighting Myanmar - Understanding LUMENS PER WATT RATING Like kilometer-per-liter (of petrol) in a car, the LUMENS-PER-WATT RATING indicates how much light that a particular bulb produces per watt of power
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Lighting – Lumens per watt Lamp typeLumens per watt Incandescent bulbs15 CFL60 Fluorescent tube HPSV100 – 150 Metal Halide lamps120 LPSV183 Light. - ppt download
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150 Watt - Perconi Series - Post Top Light - 21,000 Lumens - With Photocell - Full Tunable - Color Selectable 40K/50K - Bronze Housing
LED bulb efficiency expected to continue improving as cost declines - U.S. Energy Information Administration (EIA)