T5 offers better coverage then PL due to the length and fittings.
However, most T5 loses their intensity after 2-3 months and replacement rate can be high depending on the quality of casing and the bulb. So it could be possible that you end up buying more tubes then PL.
To have the best benefits of a High output T5, the best bet is to buy a good light set and light bulb. But this means higher cost. For economical purchases, just buy OSRAM T5 from any hardware store will do, unless you are having a marine tank.
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