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  #1  
Old 03-31-2004, 09:59 PM
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Does anyone know approx. how much their hydro jumped up when going to 3 250W Metal Halides? How about 3 400W Metal Halides?
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Old 03-31-2004, 10:10 PM
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I believe it was under $20/mo. I recall that the difference betwee n250w and 400w was very little, due to the amperage draw from the ballasts.
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Old 03-31-2004, 10:39 PM
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a simple rough calc is 3 x 250 W = 0.75 KW x 10 hr/d = 7.5 KWh.

Look at your power bill and you should see the overall cost per KWh.
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Old 03-31-2004, 10:52 PM
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Quote:
Originally Posted by Lofus
a simple rough calc is 3 x 250 W = 0.75 KW x 10 hr/d = 7.5 KWh.
times the number of days in a month....
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