Actually the LED's are not too bad
I metered them to my 18" CurrentUSA 2xT5ho fixture, and the single bright were comparable at the bottom at a ratimg og about ~300 which was about the same of the T5's at 16" height
The double brights were not quite double, but at the bottom they rates about 525
Tested the 150 HQI / T5 dixtures on a 28" tank too, and they were about 800 on the bottom
Ken - BWA
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