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My brother is in the management of a printing plant and to help with reducing electrical consumption he is looking into hi output LED lighting. It is programmable to vary the spectrum and intensity and the lumans to consumption ratio is incredibly low.

The tricky thing is in the office conference rooms that may want to be able to dim the lighting. Today they use pulse width modulation on the dimmer, varying the % of the power sine wave allowed through, but with LED lighting you want the old fashion rheostat for amplitude modulation. Otherwise you will get a strobing effect.

If you make mention of this to your management, the savings is such that you might get quite the bonus check.
 

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I would guess these are high pressure sodium or metea halide and are about 20 to 25 feet off the floor.

Yeah, metal halide. And maybe some 35-40 f up. We have actually installed some LED fixtures to test how they perform in the rough conditions of our plant. The problem with changing all of the 150 lights is that you can't do it while production is on (there's no room for lifting machines), and the production is on for about 24/7 around the year :D
 


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