What kinda heater for cool nights? or days depending on your light cycle.

I've heard oil filled radiator is best. Opinions..

well really this is a big topic. the main thing to look for is either something that creates heat dispersed over a large area, a radiator, or a mica panel (i think what its called) is great. another option is a heater with strong fan, so the heat circulates around. the key thing is to keep all the plant 1 solid temperature, and not have hot/cold spots.

the other option.... add more lights+fans.

I use a electric ceramic blower heater to control temps at night but man is it expensive, electric bill was $350 last month b/c of the heater. if you have a electric radiator I would recommend using that instead.

I'm getting an oil filled radiator I decided. My ceramic (old office one) ran all night. I need a bigger one anyway for the area.

Coho said:

I'm getting an oil filled radiator I decided. My ceramic (old office one) ran all night. I need a bigger one anyway for the area.

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That probably will be your best bet, depending on how much oil it uses =/ but you definitely don't want to use a heater that has to run 24/7.

your best bet is to get a 600wtt tent running much cheaper then any heater an produce some nice bud at the same time