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Holy shit 18 plants?? Damn thats alot. I usually try and stick to 4 plants per 4x4. Just less work watering for me lol

We talking 2 - 315s or 2 630s? ...if 2 315s..i think you will be sitting good with light. I would shoot for 3 - 315s if possible. With rectangular footprints i feel like its justified to use the 315s and sacarfice some intensity / penetration for better even coverage when working with any foot...

Unusually 20-24 for 315w N 36-40 inches with my 630s both are open hoods. I personslly wouldnt use a air cooled hood sinxe one of the biggest benefits of cmh is it high uv output and using cool hood would reduce that output

Exactly! 630s are to strong to veg with. The 315w cmh are perfect veg lights. I can put mine 5 ft above canopy and veg an entire 5x5 tent

Probably because the 315w lights were really designed for supplemental for hps and vegging as stand alone light. The 315w dont have enough power to penetrate in flower. Which is why its recommended to use a 630w cmh for flower. My first try with it I yielded 700 grams only filling 2/3 of my 5x5...

Lol idk about cmh being less efficient. Getting a lb per 315w light. I dont see many guys getting a lb consistently with 300w of cob. As well as trying to set up a thermostatic cut off. I'm not sure how running the same wattage in led as I would cmh. Then add on top of that 1100w space heater...

At least where I live. Where it's usually cooler 9 months out of the year. I rely on some heat from my lights to keep my tent warm. If running led. I would need to run heat 9 months out of the year. Shit I actually save money on electricity by using cmh because i vent all the warm air from my...

I had similar thoughts. Then tried cmh. Which took literally minimal effort to dial in and grow healthy plants with. By far the most forgiving light I've ever used. The uv. Output really helps with keeling plants healthy and insuring max resin production The uv kind of stresses the plant. And...

I usually veg with my 315w at about 24 - 36 inches. Which is plenty of light still. Sinxe penetration isny needed and more spread is I can do my entire 5x5 tent with 1 315w cmh

For sure dude. No matter how high I mount my 630. I still se better results with just a 315w cmh with 4200k bulb

Nice set up by the way man very clean and functional I think your going to do just fine. You just keep me posted on your grow I'm always intrigued with other cmh growers. Curious to see how the mixture of fast vegging and quick maturing characteristics from cmh lights pair up with the faster...

Honestly if funds are tight save your money. If your seeing new growth and there doing fine. At the worst you may experience just slightly slower growth untill that begin to gain some girth. And yeah just slam the light as high as it will go. Another tip/trick that I do is if my plants have...

Keep the lights like 5 feet away or more if possible.....trust me when I say these lights are intense as shit and put off mad uv. Its literally a mini sun in a tent and can even experience skin burn similar to a sum burn if you are I'm the tent long enough and are fair skinned. Trust me they...

Yeah I tried vegging under my 630. Stunted my plants growth. They gree healthy . But much slower Think it's just to much for them but I'm sure others have had success

I run my 315w cmh in veg at about 24 inches. Simce penetration isnt needed I can veg an entire 5x5 tent with just 315w. When I flower I switch over to my dual 315w bulb 630cmh. In which I mount it as high as possible from the beginning. Usually have about 40-44 inches between canopy. Then after...

I run the nanolux 315w cmh which even mounts. bulb vertically but it has a very low profile design. I think from bottom of fixture to the top is 8 inches?

Well not neccasarily....the idea is if you think of this way...take a shotgun for instance and point blank from 3 inches away from your target you pull the trigger. You will have a small impact site from being so close to target. Now back up 20 feet. Pull the trigger. Your impact site will now...

Uhhhhh. Dominance? I never used that term in the post your replying too. But I'll answer it any way.....to dominate or to take control over. To far succeed other similarities

I think theres plenty of data that's been created to say led is the best.....but I think the only hard evidence that would prove that are endless examples of Led and hps side by side grows where led just dominates. I am always trying to find the next best lighting so I'm always staying as...

The other thing you had mentioned about Led. Was the fact theres a definite learning curve. Qhere there lights need to be at a specific distance to get those efficient results. Which is saying unless you do absolutely everything perfect and have the lights at that absolute perfect distance then...