What angle lenses? - The Planted Tank Forum
 
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post #1 of 4 (permalink) Old 02-01-2013, 02:06 AM Thread Starter
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What angle lenses?

So the fixture i finally have plotted out will have 5 rows of LEDs and probably be about around 18" above the tank so about 36-34" above the substrate, light spill isnt a huge concern as most likely it will be in a hood.

Led layout is below on a 24" long by 6" wide fixture
Cw - cool white
Nw - neutral white
Ww - warm white
R - red
Rb- royal blue

NW RB NW NW NW RB NW
CW CW CW CW CW CW CW
WW R WW WW R WW WW R WW
CW CW CW CW CW CW CW
NW RB NW NW NW RB NW

most likely will leave the royal blue and red without lenses, but not sure what lenses for the remainder of the lights? Suggestions the foot print will be 36"x30"


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post #2 of 4 (permalink) Old 02-01-2013, 02:44 AM
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I think I would use 40 degree optics on the NW and CW, possibly 60 degree on the RB, and maybe none on the R and WW. I think this will give good coverage of the whole tank. I'm not sure how the blue and red will work out, since I haven't tried any.

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post #3 of 4 (permalink) Old 02-01-2013, 03:05 AM Thread Starter
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Re: What angle lenses?

Quote:
Originally Posted by Hoppy View Post
I think I would use 40 degree optics on the NW and CW, possibly 60 degree on the RB, and maybe none on the R and WW. I think this will give good coverage of the whole tank. I'm not sure how the blue and red will work out, since I haven't tried any.
Yea i tossed the red and blue in to really put some spikes in the photo sensitive portions of the spectrum, if i don't like them i am using solderless leds and can simply remove them, but i think overall this fixture should give off very nice light the neutrals and blue will be on one driver the cool whites on another and the warm and reds on another.

Lots of flexibility

Thank you for the input hoppy, gives me a good place to start!

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post #4 of 4 (permalink) Old 02-01-2013, 05:46 PM Thread Starter
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Re: What angle lenses?

So got a white board out and started drawing... Once the fixture is about 12-18" up i will have fantastic coverage.

This drawing puts the fixture about 6" above the top of the tank



30 on the outer rows
40 on the inner rows
60 on the middle

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