I go in but dont spend hours without long sleeve shirt. I use my regular polarized lense safety glasses in my room if there is any chance of the light being in my eyes for more than just briefly. Or....just wear a baseball cap. I just look down mostly. What I'm in there for is down anyways. Lol
Club 315w lec
- Thread starter bob223
- Start date
Lucky Luke
Well-Known Member
CMH is all new to me as well. That flower initiator kit from HLG should work with any light you choose to grow with and I believe will be standard fitment to the new 550V3. (but please don't quote me on that, i'm just assuming from a few things Stephen from HLG has said. The QB's he does are IMO the leaders in the lighting game and makes it easy to improve our spectrum with his tech- but it depends what your chasing to.)
https://horticulturelightinggroup.com/collections/all/products/flowering-initator-development-kit
Last edited:
nobighurry
Well-Known Member
I learned my lesson the hard was as usual lol, I did a vertical bare bulb grow, no avoiding the welding arc like brightness and my eyes felt like they had sand thrown in them, I bought some welding goggles asap..
Logan Burke
Well-Known Member
Not to annoy with novice questions about cmh lighting, but how many 315w/630w lights would I need to cover a 6.5x6.5 foot grow space? I only do 4 plants in this space, and they typically only take up about 5x5 or at a max 6x6, leaving me just a little room around the edges to walk around and access all 4 plants. I just can't quite pin down how many cmh lights I need for this space. Thanks for any help!!
TintEastwood
Well-Known Member
Kool Tool for what-if....
https://www.currentbyge.com/ideas/watts-per-square-foot-estimator
A write-up I found helpful.
https://growace.com/blog/how-many-grow-lights-do-your-plants-need/
https://www.currentbyge.com/ideas/watts-per-square-foot-estimator
A write-up I found helpful.
https://growace.com/blog/how-many-grow-lights-do-your-plants-need/
Well if it were me I’d do at least 4x315. You can get by with less if you have too but 4 should do well. I’m a fan of as much light as possible tho but I see all
kinda people get by with less but 3 minimum I’d say. If u got the money and wattage to use you can do 5 in there. If it was mine I’d also use the whole space if only scrogging 4 plants that leaves you plenty of room under the canopy to work(getting close but still not too old to some crawling under the trellis.)
JohnDee
Well-Known Member
Hi guys,
Just thought I'd post a follow up. Using two 315w with Philips ballasts. One light failed to start several times and also shut off if I bumped the reflector. I had done rewiring and modification of hoods so was suspecting a wiring issue.
I swapped the bulbs and the problem followed the bulb...so bad bulb. Only 6 months old and one run. Probably defective from the start. Think I'll buy a spare when I replace it.
JD
Just thought I'd post a follow up. Using two 315w with Philips ballasts. One light failed to start several times and also shut off if I bumped the reflector. I had done rewiring and modification of hoods so was suspecting a wiring issue.
I swapped the bulbs and the problem followed the bulb...so bad bulb. Only 6 months old and one run. Probably defective from the start. Think I'll buy a spare when I replace it.
JD
Logan Burke
Well-Known Member
Those are some really useful tools, really helps give a concrete number!
Precisely what I was hoping to find out, thank you! One of my issues with Scrogging is that I grow in 5 gallon DWC standalone buckets. I have to be able to lift the plant's netpot up to slide their buckets out from underneath them, so that I can dump out the old nutrient water and all of that. Is this something I could manage to do with a scrog setup? I'd really love to be able to do a scrog! I don't mind at all to purchase 4 units, it is actually the reason I just now bought a 10000 BTU window ac unit. I'm currently using a single 1000w HPS for my 4 plants, and I'm just not getting the rock hard dense colas that I feel I should be. For the time being, I'm only going to be able to buy 3 315's, but I believe this will far out-produce my single 1kw HPS light?
TintEastwood
Well-Known Member
Possible solution, or at least ideas on your bucket access needs.
Do a google search and look at images for....
"Scrog on wheels"
I have 6 plants in a 5x5 tent. It goes wall to wall buds with my 630w (2x315w bulbs in one ballast) cmh. If I could do remote ballast I may have preferred 2 separate hoods for the area, but cutting the seams and opening up my hood for wider coverage is working well in my space. A single 315 cmh would be good for 4 plants if you weren't training them. Covers about 3.5 feet x 3.5 feet.
TintEastwood
Well-Known Member
Oops. 
2x315-cmh. 1x260w-VeroCob.
I dont run the cobs at full power. About 220w. 700-1200ppm Co2.
Almost ready....
New Veg box.....under construction.
2x315-cmh. 1x260w-VeroCob.
I dont run the cobs at full power. About 220w. 700-1200ppm Co2.
Almost ready....
New Veg box.....under construction.
Last edited:
I'm curious how far I can push the watts per square foot tho. Currently doing about 45w per square foot of canopy, but I'd like to go higher. Just need to add CO2 for the heat. My 630w cmh is great, but I have trouble regulating temps so regimes using 6 inch fan. I wonder if adding a 6 inch intake fan would make much difference? I could run it through the same controller I have now on my AC Infinity t6 setup