Well, supposedly they put out 16.5% more light than the LIII. I got a pair to go on my new 150G. I like it. Same dimension as the LIII just octagon in shape. I fired up some old lamps I have and i must say they are bright. Must be just the white rock and sand though.
Here is 1/2 lit up on a 5'X2'X2' tank.
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Full shot
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Canopy
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