I’m guessing the 4 lights since the heater looks like an oil filled one and not a heating element.
No man, those oil radiators use 2kw - 2000w on max! - all lights on max output are…
So with this informstion it reslly has to mske you think! Is it really that worrying to have x2 1000w lights? 
One question for you @Matthew420 are you an LED guy? Im wondering how close i can put the 350w actual to the babies, not over excited to set the10 srdwc up tomorrow i wont lie.
Well for veg I’d keep it like 25" (but watch to see how the plants react) and down to around 18-20" for flower (again, watching).
The manufacturer should have that info available to be sure.
got it second hand on ebay 
and i cant find shit about them online - Z-NET 12 irs called, but they have so little info… wattage is good and they are build insanely well though i have to say.
Definitely space heater. I have a tiny 1850
Watt ceramic heater that I use sometimes to heat my camper and it requires a 2200W generator to run!
crazy isn;t it! people are all paranoid about the hps lights for their “high power consumption” yet your washing machine, or a heater on 24/7 not really uncommon if your wealthy (im not) eat so many more watts! 
Its interesting. How many heaters on 18 hours a day can we get away with? 
Ugh, yeah, the space heater is killing me. Can’t wait for spring so I don’t have to pay for hot air on my plants!
Why not just get a 600w hps! I mean you get a heater and light in one, leds for spring and summer hps and mh maybe mixed wiith leds for winter
And if its too much heat get a digital ballast and boomshackalscka heat control. If its stilll to hit cool tube that shiz
Hope this helps someone – I have lined my tent ( in basement) with a germination mat of the same size. I keep it on 24/7 and my tent ranges from 77-84.