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Yes. If the entire light of any type is contained entirely (including any ballast/power supply) within the grow area, one can simply convert wattage hours to btu (3.41 btu / wh). Thus: a Gavita Pro 1000e produces 3,614 btu per hour (1060w X 3.41) a SPYDRx Plus produces 2,250 btu per hour...

ETFE both lets UV through and is long lasting. It's also expensive. Google (and YouTube) "ETFE Greenhouse". JB

THANKS!!! I appreciate all the extra effort you put in to learning and sharing. JB