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Discussion Starter · #1 ·
Maybe this is an odd question. I have a 20gal high tank. 24inches long by 16inches tall. According to the charts I have seen, to have high light, I need either a 2bulb t5no or a single bulb t5ho.
I want to get a 24in long light fixture. But there doesn't seem to be a good standard on t5 bulbs. I have seen 21in, 22in, and 24in. I don't want to buy a fixture and not be able to get the bulbs for it because its not a standard size!
I have seen 2 bulb t5no fixtures, but I haven't seen any single bulb t5ho fixtures.
So if you can tell me the most common length of bulb it would be very much appreciated!
thank you for your time.
 
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