Real quick question about the Kessil A360WE blue tuna. I have a 40 breeder (36"L x 18"W) and I would like to know if 1 unit will be sufficient enough to cover the tank or if 2 would be needed..what about if I used the A360 wide angle lens? I recall hearing that the normal lens has an 18" spread. Not sure if it's a 18" diameter or 18" radius..
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