Quote Originally Posted by smokinbuds21
... i seen theses T5 tubes they were real skinny and like 2 feet long and 1000 lumens each 13 watts but i had to get smaller tumb stones for the tubes
Quote Originally Posted by bongerstonerd00d
2 foot T-5's are 24watts, 2500 lumens, or at least the ones I use to root clones under are. T-5's will not work in standard flouro fixtures either.

Right. The T5 lights used for growing are HO (high output) and bOnger is correct on the wattage/lumens (for the HO bulbs). The bulbs that HD sells are not HO (at least not that I've seen). Also, if I recall correctly, unlike both T12 and T8 bulbs, T5 bulbs are measured in metric lengths. So the 2 foot bulb at home depot is probably more like 21".

T5 bulbs cannot be retrofitted into a T12 fixture, and I don't believe they can be retrofitted into a T8 fixture either, though I'm not sure on that.

GW