I bought these when our 10g lighted aquarium hood burned out. The suction cups were strong enough to stick even to this old rough plastic. It lights up a 10g tank VERY well and the light looks nice. Like it's worth a lot more than it was. A small disappointment were the light changing settings. We played with settings that change colors for the first few minutes, but the settings are too aggressive. They pretty much range from "harsh" to "strobe" and I found that even the slowest transition setting was very frustrating for our small fish and not particularly noticeable. I wish there was a very slow fade setting because I think that would give the article 6 stars!
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