I think im actually using the same cob? Light? What are your thoughts on it? I've been thinking of upgrading to one, large, led?I have the same situation here in northern Alberta. Cool basement/crawlspace and low rh most of the year. The room is insulated but 2 of the walls are concrete with 1/2" and chipboard over it so are always a little chilly and the floor is smooth painted concrete too. If I try to hit rh as recommended by VPD charts the floor and walls sweat. By Feb it will be around 45F in the greater part of the basement and my room air is drawn in from there thru cheesecloth filters. It's 7x9x6.5'h so about a 5x5 grow spot.
I have a variety of HID lights mostly older magnetics but 3 - 600W digitals. And a Light Rail 4.0 to extend the range of a bulb. Make a 400 do the work of a 600 and a 600 work as good as my 1000W. Only uses 9W itself.
I do have a little COB light for about 2x2 of my 2x4 veg tent here on the main floor and a DIY 11 LED bulb fixture using 9W bulbs with the globes popped off to cover the other side but not well. Very limited spectrum in those bulbs and I have a few 2700K mixed in with the 5000K ones. The COB grows not bad.
View attachment 5213612
I'm really feeling this... I've been debating throwing a 250 mh in there and calling it a day!
www.lighting.philips.com
I love CMH, I'm sure your bud will be killer in that setup. I love the CMH spectrum.At the moment I have and old Philips 250 CMH in a tent with 3 Boards at 300w total. Very inefficient compared to the Boards but it has plenty of Infrared and especially significant UV.
Don’t tell anyone at RIU.
Mine has 5 COBs on it. It has no company name and calls itself a 1500W but only pulls 200W from the wall, (checked with a power meter), and might do a decent job in a 2x2' area.
Insulation in the floor as well might help keep the pots warmer.
Great idea. I though of this AFTER I set the tent up. Sigh. I did lay plastic and seal it though.
Just place the tent on a sheet of the insulation board.
Great thought. I use a humidifier inside the tent, however I know I shouod be hunidifying the room itself. Problem being I run cooled hid lights which sucks air from the room through the lights and into the next room (there's matching closets in these side by side rooms so it was an easy solution). I run this fan full blast it moves air. I think trying to humidy the room it would all just get sucked through the lights and not make it to the bottom tent vents.. however I'm going to try it.
I've already got big arse heavy reflectors up. They're a b word to get up as one person. Plus small room. I'll pocket this for next time and 100% will do it
I dont have a 250 mh at the moment. I was thinking about getting one. Cmh put out good heat?Might as well go with CMH! They make CMH retrofit bulbs that will work with standard ballasts, so you don't really have to upgrade to a whole new light fixture (digital square wave 315, etc) BTW.
Here... I *think* this is the one you would be looking for, runs at 230 watt, but puts out more lumens & better spectrum than traditional 250, and last way longer. Should screw right in a 250w MH:
MASTERColour MW eco MSTColour CDM-EP MW eco 230W/840 E40 CL | Philips
Direct retrofit with immediate energy savings for quartz metal halide | Philips
View attachment 5215110
Yeah they do fine in a 4x4. Used a 315 and 2 SF 1000 LEDs. Tent stayed toasty with proper venting.
Good tip. I use 1" styrofoam insulation under my pots to keep them warmer. Damn that stuff is expensive these days but a layer of it under the tent would sure help. The bio-herd in the pots likes it warm and become practically inactive at below 70F or so.
Great thinking about just cutting whatever size you need for the pots. I wrap it in tape to make them me durable.Good tip. I use 1" styrofoam insulation under my pots to keep them warmer. Damn that stuff is expensive these days but a layer of it under the tent would sure help. The bio-herd in the pots likes it warm and become practically inactive at below 70F or so.
I'm planning to experiment with supplying air to the pots with a little aquarium air pump and either a stone or some of that plastic air line for fish tanks wrapped in a circle near the bottom. Just a couple of pots at first to see if it does anything at maybe 15 minutes every hour or two.
The retrofit lamps are cool, I used to run a 400w mastercolor in a mag ballast about 10 years ago. I think I still have the lamp and ballast in a corner somewhere. The retrofits don't have quite the same advantage as the newer square wave ballasts, which really optimize power.Might as well go with CMH! They make CMH retrofit bulbs that will work with standard ballasts, so you don't really have to upgrade to a whole new light fixture (digital square wave 315, etc) BTW.
Here... I *think* this is the one you would be looking for, runs at 230 watt, but puts out more lumens & better spectrum than traditional 250, and last way longer. Should screw right in a 250w MH:
MASTERColour MW eco MSTColour CDM-EP MW eco 230W/840 E40 CL | Philips
Direct retrofit with immediate energy savings for quartz metal halide | Philips
View attachment 5215110
A lot more IR heat than LEDs do.
