I have a 2.5 gallon I want to make into a Pico and it would be easiest to use a USB light since I have a spare USB outlet in this spot but no regular outlets, is there a USB powered light I could use that would be good enough to grow corals?
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Soft corals Kenya trees mushrooms etc.What kind of corals do you want to grow?
What sort of small LED light would work for low-moderate light corals then? That's not USB?Short answer is no... not really no. USB is 5V and most have a max current draw of less than an amp from a usb port. If you don't plan on keeping coral then you should be fine.