I have 1 for my 20 gallons. This is a truly pure white LED. Absolutely unbeatable for the price! I've just ordered a second one because I have plants, but unless you have live plants I believe this light will last up to 20 years. I'm not thinking of the usual 20 because of the depth. The only downside is that the lights themselves get pretty hot, but other than that they're great. You can darken some spots in the tank, my chars like it, although mostly everything is positive from me.
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