Nominal Lumen Outputs

Date April 11, 2019
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With lamp technology, it's importance to note a huge difference between the lamp output and the actual delivered lumens from the fitting, once the lamp is fitted. A traditional lamp will emit light is every direction, which increases the amount of light loss through the use of reflectors etc.

Product Initial Lumen OutputDelivered LumensEfficacy
1,000W High Pressure Sodium110,000lm
400W High Pressure Sodium50,000lm
175W Metal Halide
13,650lm
7,500lm 
78lm/W
250W Metal Halide19,500lm10,725lm78lm/W
400W Metal Halide31,200lm17,160lm78lm/W
1,000W Metal Halide
78,000lm42,900lm78lm/W
1,500W Metal Halide117,00lm64350lm
1,500W Tungsten Halogen
33,000lm

22lm/W

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