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    COB efficiency Spreadsheets

    @doz, thank for your reply. I guess I used a bad example. With CXB3070 I get the same numbers as you. But what if we go to Cree's CPT tool again at http://pct.cree.com/dt/index.html and pick CXB3590 36V CB, the smallest current shown there is 1.400. How do you guys find the lumens and Watt info...
  2. O

    COB efficiency Spreadsheets

    Thanks. Let me try asking this question a third time. Are the spreadsheets available on this thread only PNG images or is there a excel or something available for download somewhere? Thanks
  3. O

    COB efficiency Spreadsheets

    Guys, me again. I'm studying cree led lamps for a few weeks, and I'm beginning to understand things, but something still doesn't make sense to me. If I use cree's tool at http://pct.cree.com/dt/index.html and fill with CXB3070 with CB bin, I see the list with current (amps) and lumens...
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    COB efficiency Spreadsheets

    Hi everybody. Please excuse me for my probably very stupid question. Everywhere on the forum I read "check the efficiency spreadsheet thread". Here I'm, but I didn't find any spreadsheet to download or use. I mean, is there an actual spreadsheet (excel or like?) file to download, or do you mean...
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