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  1. G

    DiY LED - Cree CXA3070

    OK. I think I got it. So at 50% efficiency to get 13.5 PAR W/ft you would be at 27 dissipated watts per COB. Thank you for all your work that you are sharing. I am most appreciative, particularly, with supply power costs here doubling in a month or so.
  2. G

    DiY LED - Cree CXA3070

    Just signed up after reading about the good work you all are doing the last few days. I am beginning to get a feel for it. Hope you can help me with concept of Dissipated Power. Is that the non light power going to the heat sink or total power used? And when you say, for example, you have...
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