I just don’t have the temp or any appliance creating heat. Winter time, I’m 3-4 degrees above the ambient temp outside the tent. Think it is what it is, drawing radiant heat off the boiler isn’t doing enough. If this oil space heater isn’t an efficient option I’ll just run a 250hps I’ve got in a box somewhere.Correct on wanting a taller tent. I’d like a wider one too. Fits the space for now, it’s to start my vegetable garden. Will be a mother tent eventually. LED is a 200w vivo aerowing(?) Was hoping to dip my toe in with LED’s before deciding how I want to build out the rest.