I didn't say they hurt the fish. The lights themselves are hardly noticable. At night if a fish swims infront of them they might make a slight silhouette. The light provided by the "laser" isn't bright enough to affect the day night cycle. So, in theory they are more beneficial than a full spectrum light because the fish are getting the special types of light constantly only without the bright lights that you get with a full spectrum. I don't know if they cause harm to fish, I haven't seen any and I can't tell the differece in the fish because I already use a very nice lighting system. I do know that it looks nice and doesn't cause harm with the day night cycle. As for Disco lighting effects.. Its a far cry from disco lighting.. just enhanced lighting, and it is not a "true" laser. It is more light a light funnel/focus something like the tunnel lights used to pump sunlight into dark places from outside. though the beam stays more compact. A laser on the other hand is more than focused, and not all lasers are dangerous to humans though most can affect vision if put directly on the eyes. Lasers are significantly more powerful as well using alot more light focused into one thing and they use different types of light. I am not trying to sell or stick up for the laser system, I just think the idea that it hurts fish is ridiculous, and if you saw it for yourself you would see what I mean.
