hey first time poster long time admirer.
started a grow room about 8 feet by 4 with about 20 plants.
have a 600w bulb and have the room well insulated.
just wondering will there be sufficient heat coming from the HPS to maintain the temp or will i have to bring in an outside source. just worried since its coming into winter and all.

If you dont have a light mover you are going to need another light for that area. Try to keep the temp above 65f. 75f would be better.

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Man, 'O Man ... I'd be going with two 1000 watters in that space. Its like two 4x4 tables. Two 600's would do the trick too but not as tricky.
*lol*
Vi

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Liberals are people that will believe anything twice.

Good luck with the 600 watt bulb. Would think it needs to be at least 1000 watter. But see what happens. Hope you have insulated it well enough that no additional heat is needed. You will have to wait and see there.

Good luck.

shite. thought that 600w would be sufficient. im gonna have it well insulated. im too worried about the electricity bills being a tad bit over the average. has anyone ever heard of people getting caught his way or is it just an urban legend. thanks for the input.

Gettin turned in by the meterman is common but 1000 watts aint much

My first month, my bill went up about $50, with a 1000 hps and fans, pumps, etc. I timed mine to start around the beginning of summer.