When I first set up my tank with the Sols I didn't see any disco ball effect but after I put a glass lid on the tank there are a few spots with this effect. Mostly in shadowy spots from rock overhangs. The condensation bubbles on the glass are what is causing it in my tank. Two years ago I did see a tank with LEDs and I started getting a headache after looking at it for just a few moments. It took me 2 years after seeing this to consider trying LEDs on my own tank. For this reason I went with the cheaper Sols in case I hated the lights but it is really nice and I have great bright coverage and I'm only up to 60% so far.
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