No, but it should give an adequate representation of moonlight on a tank up to about 300 gallons, the key is placement. It needs to be on the side of the tank with a very slight downward angle so it casts light over most of the tank.
Hmmm... I had mine in the middle with it pointing down - obviously that doesn't work. My LFS suggested that I try shining it up into my MH reflector so I am trying that tonight. I will try your suggestion tomorrow.
I would just clamp it to the side trim so it would be about 1.5-2" from the water, the key is a very slight downward angle so the main spot of the beam hits the tank about in the middle.
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