Hi everyone. I have a problem with heat in my indoor grow, and I'd really appreciate the input of the experienced indoor growers on this site.
I have a wardrobe. I'm trying to grow two or three small plants (personal use only). They're at the seedling stage now. Anyway, these are the relevant facts as far as I can tell:
- The wardrobe is roughly 45cm deep, 80cm wide, and 120cm high. I have the plants on a shelf, so if necessary I can remove it and extend the height of the wardrobe to 150cm, but it's currently at 120cm.
- I have a 250w ballast and two globes: one is HPS and the other MH. Both seem to work in the same ballast (I think it's an HPS ballast and the MH globe is a special one that works with HPS ballasts).
- There is a 120mm exhaust fan at the top of the wardrobe, and I've drilled a few passive intake holes along the bottom.
Anyway, the main problem is that when the HID light is on, the heat goes crazy. The wardrobe is in the shed, and it gets hot enough in there during the day, but the light adds about 15C to the ambient shed temperature. Thus when it's about 30C in the shed, I'm reading around 45C or more in the wardrobe. This is too high, obviously.
I'm running the light about 40cm above the plants, but I can raise it if necessary. Regardless, I don't know if it will make a huge distance. The temperature readings that I'm measuring are taken at the seedling level.
What I'm wondering is: is the light just too damn powerful for such a small place? Has anyone ever successfully grown using an HID lamp of this wattage in such a small space? Should I shift to CFL lights? I'd rather not, because I don't want to fork out any more money!
Does anybody have any input on this topic? Thanks all in advance for your help.