I've ordered a couple, but they are low wattage, i'm not expecting them to break any records though. As it is. I've got a 600w oil heater in the tent at the moment, and even it's struggling during these single digit nights (9C and under). I'll use them along side the oil heater for now.
But I dare say they'll end up in a small Veg/Mother tent eventually though.
EDIT: Had been looking at these
Ceramic Heaters and thinking of hooking them up to a
Inkbird Temp WiFi. But i'm unsure how these type of heaters would go in a tent. Anyone got any thoughts on it?