I just put it over my 2 half barrel planters in my unheated basement.
Each barrel was crammed with tropicals that I wanted to overwinter for clients.
I didn't mind the extra heat cuz the basement needed it.
Kept it on a 12 hour timer.
After 12 hours, the basement would be about 75-80*.
In the mornings, it would be down to about 55-60*.
So it worked as a light source and heat source.
Lots of people told me it was the wrong spectrum, but my lilies grew just fine, a little too well!