Finnex Ray II Ultra Slim LED DS - Dual 7000k 24 inch - The Planted Tank Forum

 
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post #1 of 4 (permalink) Old 03-21-2013, 03:05 PM Thread Starter
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Finnex Ray II Ultra Slim LED DS - Dual 7000k 24 inch

What kind of lighting would the Finnex Ray II Ultra Slim LED DS - Dual 7000k provide on a 20H tank?

I don't understand these LED lights and PAR.

Would this be low, medium, med-high, or high?

Thanks
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post #2 of 4 (permalink) Old 03-22-2013, 01:06 AM
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The first step is to figure out how far the light will be from the top of your substrate. 20 H is like 23" high I think and you'll want 3" of substrate so 20".

Next you go to this thread:

Lighting an Aquarium with PAR instead of Watts

And look at the charts..you're looking for PAR vs Distance for LED's..

You'll see the Finnex Ray II 24" listed.. at 20" it says about 50 PAR.

Compare to:
Low light - 15-30 micromols of PAR - CO2 is not needed, but is helpful to the plants
Medium light - 35-50 micromols of PAR - CO2 may be needed to avoid too many nuisance algae problems
High light - more than 50 micromols of PAR - pressurized CO2 is essential to avoid major algae problems

Hope this helps.
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post #3 of 4 (permalink) Old 03-22-2013, 04:25 AM
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^I told him/her this in another thread

20H is 16 3/4 inch, a 20 extra high is 23 3/4. (from the charts I'm looking at). I'm not aware which one he/she has.

Last edited by latchdan; 03-22-2013 at 04:30 AM. Reason: tank hights
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post #4 of 4 (permalink) Old 04-18-2013, 02:00 PM Thread Starter
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Thanks. I think I understand it now.
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