The Planted Tank Forum - View Single Post - One Way to Design a Planted Tank LED Light
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post #24 of (permalink) Old 03-16-2013, 05:58 AM
Algae Grower
Join Date: Aug 2004
Location: Sammamish WA
Posts: 41
Originally Posted by skanderson View Post
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.
The calculator relates six variables. You provide five of them and it calculates the sixth.

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.
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