Heater or no heater?

Temps are getting cold around here and only getting colder. My daytime temps are currently running at 67-70, nights are 60-63 (last night dropped to 59). The room is pretty well insulated in my shed, and those are with outdoor temps dropping to low-mid 30's at night right now. Everything looks healthy and Im seeing no adverse effects with these temps, but Im wondering if running these temps throughout flower will have any adverse effects. Im considering adding a small heater into the room on the same timer as the lights and setting the thermostat to maybe 70 or 75, and leaving the current night temps.
Im currently on day 7 of 12/12 with a 315w cmh... man these things put out no heat at all. It takes about 3-4 hours of lights to raise the temps up only 5 degrees or so. Maybe after this run Ill add a second 315 just for the heat lol... might as well use the energy on more light rather than a heater right?
Taken yesterday. These temps have been like this for the whole week of flowering so far.

This is from The Marijuana Grow Bible

Marijuana grown indoors functions better at moderate temperatures between 70 and 75*F (21-23*C) during the light period and a drop of no more than 48.2*F (9*C) to 60*F (15*C) during the dark period. CO2-enriched plants will produce more at a marginally higher temperature of just under 80*F (27*C).

If the temperature drops below 60*F (15*C) during the dark period, plants will grow more slowly and yields will not be as abundant. This won’t be readily apparent if you aren’t particularly familiar with the garden’s normal output. A few nights of cool temperatures won’t significantly damage your crop, but if it continues to occur throughout the flowering period, it can definitely be cause for concern. A CO2 generator or electric heater can heat the room adequately.

If the floor can have a steady temperature at around 80*F (27*C), the roots will be warmed and the stems and leaves will withstand influxes of colder air. A heating mat is ideal if you’ve only got a few plants to worry about. Larger gardens might require the use of a recirculating hot water heater to ensure optimal temperatures.

Most outdoor varieties can endure temperatures as low as 50*F (10*C) without any problem. That being said, fifty degrees is still not an ideal temperature because it tends to slow down tissue growth and photosynthesis later in the day. Anything below 40*F (4*C) can result in damage to the tissue. Gas patio heaters can keep gardens warm on frigid nights. Maintaining a temperature of 60 degrees will promote plant growth substantially.

These outdoor plants can also benefit from a polyethylene plastic covering that keeps things nice and toasty while also protecting the garden from the elements. Heaters can increase protection even more.

Yes. Get a small heater and one of these:
https://www.amazon.com/WIN100-Heating-Cooling-Programmable-Thermostat/dp/B000E7NYY8
and control your temps throughout the day.

@Chorse I have had nothing but problems with the lux. Your works with no problems? I actually now use the

http://www.ebay.com/itm/like/222171105327?lpid=82&chn=ps&ul_ref=http%3A%2F%2Frover.ebay.com%2Frover%2F1%2F711-117182-37290-0%2F2%3Fmtid%3D1588%26kwid%3D1%26crlp%3D119331062289_324272%26itemid%3D222171105327%26targetid%3D256973947183%26rpc%3D0.18%26rpc_upld_id%3D82584%26device%3Dm%26mpre%3Dhttp%253A%252F%252Fwww.ebay.com%252Fulk%252Fitm%252Flike%252F222171105327%253Flpid%253D82%2526chn%253Dps%26adtype%3Dpla%26googleloc%3D9004037%26poi%3D%26campaignid%3D654061812%26adgroupid%3D35787323751%26rlsatarget%3Dpla-256973947183%26gclid%3DCjwKEAjwsuK_BRDD9ISR1bawwUwSJACbOiix2PPB6OXo7LI9fBcI_Lgs_dvy--NTogMIVgW_tuJ2ShoClqrw_wcB%26srcrot%3D711-117182-37290-0%26rvr_id%3D1106519375472&ul_noapp=true

Chorse said:

Yes. Get a small heater and one of these:
https://www.amazon.com/WIN100-Heating-Cooling-Programmable-Thermostat/dp/B000E7NYY8
and control your temps throughout the day.

Click to expand...

Davmalk, thanks for all of that info. Ive read all of that and have read about temps on various websides and books but I was just curious as to what peoples actual experiences were.
Chorse, thats exactly what I was looking for. I got a small heater with a built in thermostat and timer but Ill order that as well for a little more flexibity.

Bose said:

@Chorse I have had nothing but problems with the lux. Your works with no problems? I actually now use the

http://www.ebay.com/itm/like/222171105327?lpid=82&chn=ps&ul_ref=http%3A%2F%2Frover.ebay.com%2Frover%2F1%2F711-117182-37290-0%2F2%3Fmtid%3D1588%26kwid%3D1%26crlp%3D119331062289_324272%26itemid%3D222171105327%26targetid%3D256973947183%26rpc%3D0.18%26rpc_upld_id%3D82584%26device%3Dm%26mpre%3Dhttp%253A%252F%252Fwww.ebay.com%252Fulk%252Fitm%252Flike%252F222171105327%253Flpid%253D82%2526chn%253Dps%26adtype%3Dpla%26googleloc%3D9004037%26poi%3D%26campaignid%3D654061812%26adgroupid%3D35787323751%26rlsatarget%3Dpla-256973947183%26gclid%3DCjwKEAjwsuK_BRDD9ISR1bawwUwSJACbOiix2PPB6OXo7LI9fBcI_Lgs_dvy--NTogMIVgW_tuJ2ShoClqrw_wcB%26srcrot%3D711-117182-37290-0%26rvr_id%3D1106519375472&ul_noapp=true

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Christ, look above at your link to that "shipped from Hong Kong" thing you are pushing. Lol.
Ummm...you can run down to Lowes for the one I am.

I have had my LUX unit for 4 years without ANY issue. I regard it as the single most positive purchase for my grows. I also have 6 LUX zone thermostats in my house that work great...many for over a decade. While ONE of the originals of those six requires working with some button issues. It still works fine.

Bose said:

@Chorse I have had nothing but problems with the lux. Your works with no problems? I actually now use the

http://www.ebay.com/itm/like/222171105327?lpid=82&chn=ps&ul_ref=http%3A%2F%2Frover.ebay.com%2Frover%2F1%2F711-117182-37290-0%2F2%3Fmtid%3D1588%26kwid%3D1%26crlp%3D119331062289_324272%26itemid%3D222171105327%26targetid%3D256973947183%26rpc%3D0.18%26rpc_upld_id%3D82584%26device%3Dm%26mpre%3Dhttp%253A%252F%252Fwww.ebay.com%252Fulk%252Fitm%252Flike%252F222171105327%253Flpid%253D82%2526chn%253Dps%26adtype%3Dpla%26googleloc%3D9004037%26poi%3D%26campaignid%3D654061812%26adgroupid%3D35787323751%26rlsatarget%3Dpla-256973947183%26gclid%3DCjwKEAjwsuK_BRDD9ISR1bawwUwSJACbOiix2PPB6OXo7LI9fBcI_Lgs_dvy--NTogMIVgW_tuJ2ShoClqrw_wcB%26srcrot%3D711-117182-37290-0%26rvr_id%3D1106519375472&ul_noapp=true

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Interesting, I like the price on that one a little better. How do you wire it though?

KushyMcKush said:

Interesting, I like the price on that one a little better. How do you wire it though?

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I rigged it up a junction box. Not hard to wire and it has to outlets so you can have your fan in one outlet the heater in the other. It also has a temp sensor wire so I keep my unit outside the grow box.

It reads in Celsius I keep it at 25 - 19 i can see the Temps outside my grow area. You won't be dissipointed. I have the lux it sometimes don't work inside the grow area.

Oh ok, I didn't see any outlets from the pics. I think Ill just set the thermostat on the unit to 75 for now until I figure out a better thermostat and see hiw it works. Like I said, the room is very well insulated so if I have it heat up to 75 during lights on, it wont drop below 60-65 during lights out. It just wont move above 70 with this light lol.

Or maybe Ill just grab a regular home thermostat at home depot and wire that up. My dad knows all about that stuff so ill just have him help me out with it. Thanks for the advice guys!

Chorse said:

Christ, look above at your link to that "shipped from Hong Kong" thing you are pushing. Lol.
Ummm...you can run down to Lowes for the one I am.

I have had my LUX unit for 4 years without ANY issue. I regard it as the single most positive purchase for my grows. I also have 6 LUX zone thermostats in my house that work great...many for over a decade. While ONE of the originals of those six requires working with some button issues. It still works fine.

Click to expand...

LERWAY Tech. And you can get this on amazon for $15 much better than the lux. Better control.

Bose said:

LERWAY Tech. And you can get this on amazon for $15 much better than the lux. Better control.

Click to expand...

Again, I have never had any problem with my LUX. I would be interested in the details of the problems you have had. I also would like to know how your suggestion offers better control.

Over an above that...the LUX one simply plugs into an existing outlet. Has multiple settings for changes within a day. Can be used to affect cooling as well as heating

I have purchased "ships from Hong Kong" stuff in the past (hydrometers/speed controller) and all were junk. And returns requests were ignored.

Oh and the LUX can switch between fahrenheit and centigrade, 12 and 24 hour clock, and from thermostat or outlet control.