Uvb

@Randomblame have you ever used this:https://www.ebay.com/i/382481597013?ul_ref=https%3A%2F%2Frover.ebay.com%2Frover%2F0%2Fe11011.m43.l1123%2F7%3Feuid%3D458506023bef4768bdf66374c86c1948%26bu%3D44377081091%26loc%3Dhttps%253A%252F%252Fwww.ebay.com%252Fulk%252Fi%252F382481597013%26sojTags%3Dbu%3Dbu%26srcrot%3De11011.m43.l1123%26rvr_id%3D0%26rvr_ts%3D63b8aa9316c0a9e474f6f073fffc9d3c&ul_noapp=true

Would it be as good as a T5 for uvb?

Same same per watt. But half the watts of a 4' t5 from them in the same series so half the output. would mostly cover 1 square meter with sunlight like uv levels from my researching.