I have an older 14 gallon bio cube and it seems they no longer generate light for it. The new Biocubes have LED strips. I could see from another review here that this worked for someone older than Biocube. I have this and it works great! I was very happy that I found this. I also need a blue actinic bulb which I couldn't find but I'm glad I found at least this one. I've had it for a few months now and it's still working great.
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