you mean to power the light?
i think so, but who knows. that is one of the advantages they use to market them. you can get a meter that plugs into your lights and it will tell you how much you use in a $ amount. you have to enter a few #'s from your bill to get a actual $.
but for a moment throw all that out the window. think of it this way. HPS you need. a hood, ventilation for the hood, and sometimes exhaust for the room. not to mention isolating fans. with the t5s i use, all i have is the lights.
i usually flower under 1000w hps. i sort of got ahead of myself this time. i have 2 under the HPS day 25 of flower, and i have 8 under the t5s that just flipped to flower 5 or so days ago. (2' 8 bulb 6500kea at 192w $175) i have seed from nirvana that i want to start, so the 8 will probably go to harvest under the T5s.
a comparisons between yields from T5s vs HPS per watt?
that would be a question i like someone to answer, or share there experience.
give me about 60 days and i can share what i learned.