I had heard that cmh put out a fair bit of heat and thats why i used cfl as supplemental lighting to my blackdog phytomax 2 600 watt in a 4x4(thats getting a fair bit larger) and was very interested in cmh and was turned away from them. I'n fairly new to cultivating it so I say this from a blank slate standpoint, not trying to disagree just so were clear. lol. Agronut- you use cmh as your primary not supplemental?
Seem to be working great for me.....
One CMH, a 315, won't add a lot of heat.......about 6-8 degrees hotter fahrenheit in a 4 x 4, if your room temp is about 60-65 degrees. If the room where the tent is, is above 65 it might add 8-10 degrees of heat. My first run was CMH in a 4 x 4
yes i use a 630w CMH in a 5x5 as primary horizontsl light source, and during flower I supplement with a vertical 400w HPS hanging between plants in addition to the CMH, and my 8 inch inline fan keeps lights-on temp around 78 degrees consistently. Ive run a 315w CMH by itself during veg without venting and kept temps around 77-78 as well.1 CMH bulb puts off very little heat overall.
dope. good to know. any brand recommendations? also do they make a double ended 630 cmh(all 630s might be made with two bulbs, i just dont know) that you can run one bulb as a 315 in a pinch or run them both? I might be dreaming big here but thought id ask
i ordered my 630watt CMH fixture from Vivosun, good not great, but you can definitely run it with just one bulb and it works perfectly. I run dual spectrum throughout with one 4100K bulb and one thats 3800K....however you can get much better coverage by getting two separate 315w CMH fixtures for your tent and hanging them about 12 inches apart. I’d just buy one 315w fixture and figure out how to hang it in the middle with your LEDs on either side of it, maybe angle them a bit more/deeper into your canopy.
140. Without bulb.
140. Without bulb.
V-Lux Vertical CMH 315w LEC Grow Light Reflector Hood Kit Fixture 120-240v | eBay
Vertical Lamp 50/60 Hz. Square Wave. Built in Thermal Protection. We take our reputation seriously.www.ebay.com
Pics here.
dope man. I appreciate your input. im going over to growco today to talk to my people there and see what they have in stock. Buy local, support your growing communitys life force(your local grow shop. lol) I say it just as much for myself, lol, its easy to get everything dirt cheap online and have exactly what you want delivered directly to your door. Sorry had to use my pulpit to give a shout out lol
horticulturelightinggroup.com