T5 lights typically come with good reflectors, usually an individual reflector for each bulb. The bulbs are also much brighter than other fluorescent tubes. You need less watts of T5 light to give the light intensity that AH Supply type lights give. How much less depends on the reflectors, the bulbs, etc. I think if you use about 25% less wattage with T5 lights you will be in the right ballpark.Hi there,
are watts needed for t5's the same formula used for fluros? would 6x54watt t5's be enough/too much for a 4x2x2?