|03-18-2013 04:39 PM|
|03-18-2013 04:32 PM|
|Wasserpest||Is there a direct relationship between Lumen and PAR? I am not an expert, but I thought they are two different units, and things like spectrum play a role? Like having two LEDs with the same luminous flow, one with peaks in the yellow/green area, another one more in the red/blue photosynthetically speaking more significant area ?|
|03-18-2013 12:42 AM|
I just tested it in Google Docs and it works. Make a new spreadsheet in GD and then go to File/Import and choose "New Spreadsheet" and point it to the xls file. It will upload it then you'll be good.
|03-18-2013 12:07 AM|
|Hoppy||With a PC I think you do need to have Excel or Office installed to make the spreadsheet work. Without it, it is just a table in a document.|
|03-17-2013 10:54 PM|
|skanderson||i think it is because i dont have microsoft office installed does that sound right?|
|03-17-2013 10:52 PM|
|skanderson||that may be the problem. any way to change that? im not a tech person by any stretch of the imagination.|
|03-17-2013 12:33 AM|
|m00se||Sounds like it's opening the spreadsheet in read only mode.|
|03-16-2013 10:33 PM|
|Hoppy||Are you using The Excel spreadsheet program? If so, you should be able to enter values the way you would with any other spreadsheet.|
|03-16-2013 06:49 PM|
|skanderson||that isnt my problem, i have 5 of the variables but i cant get any variables entered into the calculator. any advice on how to put it into the spreadsheet or do i just need to do it by on paper.|
|03-16-2013 05:58 AM|
You need to answer the following question: what do you want it to calculate ?
Then you need to provide data for all the other five variables. From your statement you already have:
LED height = 48
Cone angle = 30
If you can get the value of three more variables, the calculator will give you the value of the sixth.
|03-16-2013 03:16 AM|
|skanderson||im having trouble inputting figures into the spreadsheat. anyone have advice? im planning a led fixture for my new 300 cube build. 48x48x30. thinking of keeping the leds 48 over the substrate and using 30 degree lenses.|
|03-04-2013 04:32 PM|
The calculator says about 30 micromols of PAR at 28 inches.
|03-04-2013 06:34 AM|
4 inch betwen the rows.3,5 inch center to center in the row.
|03-04-2013 06:18 AM|
|Hoppy||How far apart, center to center, are the bulbs? I don't think my empirical equation will be very accurate for this type of setup, but it may be close enough to know if you have very high light or low light.|
|03-04-2013 04:49 AM|
Hoppy,I am asking for your help and opinion-what PAR will get with these 14pcs 3x1w,60deg optics,28inch from substrate,270lm each bulb
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