The Planted Tank Forum - View Single Post - First impressions on Kessil Amazon Sun
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post #11 of (permalink) Old 03-03-2012, 03:56 PM Thread Starter
Algae Grower
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Join Date: Oct 2009
Location: Montreal, quebec
Posts: 38
I've unearthed a long forgotten light meter and took light readings on both Kessils. Readings are in footcandles: best I can do at this point. Since I will be lighting a 120p, I suspended both lamps 16" apart and 24" high as a starting point. Interesting to see that the light readings were a bit higher in between both lamps than directly under. It suggests that I could separate the lamps to attain better distribution. Take note however that I "guestimate" error to be around 10%, if not more. Obviously a PAR meter will give the real story here, but the readings suggest nonetheless a significant drop off at the outer perimeter of the light field.

Originally Posted by samamorgan
I haven't checked into the kessil fixture much, but i assume it uses some sort of reflector or lens.
Yes there is a small lens.
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