New 5x5x7ft Tent and 315w CMH

[Jjgrow420]

Wanna send me one? Lol naw jk. Yea I know all about cheap bulbs, I have some rather nice ones for my MH and HPS fixtures. Sucks they don't take the same socket



That's decent right there! What kind of LED???


Yea I don't mind spending $50 or less, I just can't justify anymore right now, with Christmas and my daughters bday right around the corner. Lol

I'll post a pic of my CMH drawer. My buddy is borrowing 2 of my fixtures right now and 2 bulbs so I'm down a couple

 

[Jjgrow420]

Also always make sure to protect your eyes and skin when in and around cmhs close range.they are jacketed to reduce the amount of UV but they still pump it.

 

[Fangthane]

Hell of a deal .. used?
I think I got mine for 75 on sale

Nope, brand spankin' new. I was new to CMH and didn't know if the brand was any good, so I just bought 1. The shitty no-name bulbs Amazon was selling were actually more expensive than the Sunmaster at that point. Kinda kicking myself about not buying a few at that price when I had the chance.

 

[Norml56]

Hell of a deal .. used?
I think I got mine for 75 on sale
I love my 315s
They have a de 1000 CMH or 900 can't remember. It's a beast. Gotta have alot of headroom though which I don't have so I just run 3 315s in a 5x5 with a QB to fill the gap
The spectrum is key. It also produces alot of ir and UV

Keep in mind that most cmh bulbs have a coating that stops most of the uv light. Solis tek is the only brand that I knew of a few yrs ago when I ran them that made an actual cmh grow bulb that allowed uv thru. Lol didn't see your next post.

 

[Jjgrow420]

Keep in mind that most cmh bulbs have a coating that stops most of the uv light. Solis tek is the only brand that I knew of a few yrs ago when I ran them that made an actual cmh grow bulb that allowed uv thru. Lol didn't see your next post.

Ya got it covered.. literally

 

[Jjgrow420]

Nope, brand spankin' new. I was new to CMH and didn't know if the brand was any good, so I just bought 1. The shitty no-name bulbs Amazon was selling were actually more expensive than the Sunmaster at that point. Kinda kicking myself about not buying a few at that price when I had the chance.

Ya they are the best bulb I've ran hands down

 

[Fangthane]

Ya they are the best bulb I've ran hands down

Heh. Yeah, NOW someone tells me.

 

[fanya]

I'm running dual 315s. Currently running Philips 3ks. I have them in a heavily modified medium adjust-a-wing. Screen grow space is 32"x39" Plants below are day 32 above soil. Everything seems to be going well. First run with this set up. Back left one for stunted cause it got sunburned cause I didn't keep the light high enough. It's probably too much light for the space, but I didn't think one bulb would cut it.

 

[shotnva777]

I'm running dual 315s. Currently running Philips 3ks. I have them in a heavily modified medium adjust-a-wing. Screen grow space is 32"x39" Plants below are day 32 above soil. Everything seems to be going well. First run with this set up. Back left one for stunted cause it got sunburned cause I didn't keep the light high enough. It's probably too much light for the space, but I didn't think one bulb would cut it.

View attachment 5348702

View attachment 5348703

Maaaaan! TY so much for posting this, as this is what I planned to do, to make my hood dual CMH. Now I just need another ballast and socket!!!!

By the way, FWIW, I think u have a cal/mag deficiency from those photos

 

[shotnva777]

I'll post a pic of my CMH drawer. My buddy is borrowing 2 of my fixtures right now and 2 bulbs so I'm down a couple

Thanks brother, but I was just messing with ya! Haha... by the time these are ready for flower, I'll have me a bulb I believe

 

[shotnva777]

Checked on the girls this morning after raising the temps to 80°f and lowering the lights to 18". Man, this is what they've been needing!

I believe the Afgani in this strain is really showing itself with the massive fan leaves, close node spacing and really enjoying this hot, bright, dry climate. As they are worshipping this light!!!

 

[fanya]

Maaaaan! TY so much for posting this, as this is what I planned to do, to make my hood dual CMH. Now I just need another ballast and socket!!!!

By the way, FWIW, I think u have a cal/mag deficiency from those photos

They probably need to be fed in general, day 32 and haven't applied any nutes yet. Some of it is definitely light stress though.

 

[shotnva777]

They probably need to be fed in general, day 32 and haven't applied any nutes yet. Some of it is definitely light stress though.

Oh yea I'm sure it is. But yea, I'm sure they're ready for a feeding too. I feed my plants like crazy lol

I think im going to go with this Par Pro bulb for the time being, as it has the best feedback I've found, for this price point. Anyone know about it?

 

[fanya]

Oh yea I'm sure it is. But yea, I'm sure they're ready for a feeding too. I feed my plants like crazy lol

I think im going to go with this Par Pro bulb for the time being, as it has the best feedback I've found, for this price point. Anyone know about it?

I don't think there are enough people using them to give you any real feedback. The comparison below has the Philips 3k with the most par out of those tested. Go with whatever makes you happy.

Ceramic Metal Halide CMH 315W Lamp Comparison Test Data & Review

<iframe src=

growershouse.com

 

[coreywebster]

growers house tested CMH bulbs along time ago here is the tests

im currently in the process of setting up a CMH light im replacing my led.
led is awesome because high end led's produce 220 lumens per watt+/-
CMH lights depending on the bulb can produce anywhere between 70 to 120 lumens per watt.
the thing that CMH lights have going for them is the spectrum
View attachment 5348621
look at the difference between LED and CMH spectrum its a huge difference

Thats no modern LED spectrum .

 

[shotnva777]

I don't think there are enough people using them to give you any real feedback. The comparison below has the Philips 3k with the most par out of those tested. Go with whatever makes you happy.

Ceramic Metal Halide CMH 315W Lamp Comparison Test Data & Review

<iframe src=

growershouse.com

I'll go with the Phillips then. This is what my LEDS run, are Phillips diodes.

Thats no modern LED spectrum .

Nope. Better! Lol

 

[coreywebster]

So, I had a friend graciously gift me this here setup. I plan to set it up during the coming days. It's a 5x5x7ft Vivosun tent, with a Hydrofarm Phantom 315w CMH to go with. It also has all the Inkbird controls, with an AC Infinity inline duct fan, paired with the biggest damn charcoal filter ive ever seen! Lol. He also gifted me a 150w Blurple COB LED and a bunch of other timers, thermometers/hydometers, extra industrial duct fan, surge protectors, etc. What a f*ckin guy!!!!

Now I have about 500w of LEDS lying around that I can use already for this setup, but its 3 entire different lights, that don't match. 300w are in my 2x4 now. But, I think the CMH will be a cleaner setup and look. Hell, it will probably grow better as well! I also have heard really good things about CMH's, so I'm excited to try it out. Efficiency isn't a huge deal here and it's obvious my friend didn't cut corners with his hobby....

Now. I've had a lot of other HID setups, but never a CMH. Only a few smaller ones that I've made out of house fixtures/ballast and my bought MH/HPS 600w cooltube grow light, that i still have. This is by far the nicest stuff I've ever owned haha... It's my understanding that these don't get as hot, or use as many watts, but still put out the same amount of light as an equivalent HID or LED. Is this correct? I'm just wondering if this light is big enough for this setup and will grow like i need it to? He swears it is and claims massive yields from one Gorilla Glue Auto run, using this setup and I'm not doubting his ability or anything of that nature, he's a good friend... I'm just wanting some other opinions. Maybe of some other ppl that have a similar setup? This thing only has ONE GROW under its belt.....

He also swears it doesn't get very hot. That he just had it in his garage, with the negative pressure of the inline duct pulling outside for air. He claims he even had to use a heater during lights out. All of which I believe, as it was in his garage. This is going in my house though, so I plan to have an inline duct, hooked to the Rainbird (so it cuts on and off at free will to keep in my set parameters), coming directly from outside and the cold winter air that it holds via a window. As well as the AC Infinity doing its think 24/7, which is sucking air out of that same window, via the charcoal filter. If it does indeed get too hot still, with that going on. I have the ducts to attach onto the sides of the light fixture, to make it a cool tube type setup. So I think I have the temp under control, I definitely have lots to work with and could easily have winter air pulling over that light in an instant.

*Update - I'm actually thinking of swapping the light fixtures and using my MH fixture, as it is vertical and already has the ducts on it. Would I need to swap the entire socket and cord over to that hood? I don't believe they have the same connections, so I'm sure I would. But it's easy enough. I'm planning a setup, like I have pictured...

That said, does anyone have any opinions on this sucker? I have 6 Vaghan Marmalade's from a breeder by the name of Jolly Pond Farm's out of my local Virginia. 2 of which are clones and still in the humidity dome right now - they're from the biggest plant. All of this is in my 2x4 tent right now and as u can expect, it's already crowded. Im really excited about these plants, as theyre already SUPER bushy and bulking up nicely. Its a cross of VA Beach Ghani and Limetta Maramalade. Everyone is always raving about the Virginia Ghani, so im very excited to see it bred with a lemon strain! I plan to throw them into the tent, along with a Critical XXL Auto (that is in germ now) during their veg stage. When the auto finishes and i harvest some smoke..... thats when ill flip the phenos.

Thoughts, opinions, anything? Lol!
- Peace!

A single 315 cmh won't light up more than 3x3ft in flower. Least not to get top quality buds.
So take that into account.

 

[shotnva777]

A single 315 cmh won't light up more than 3x3ft in flower. Least not to get top quality buds.
So take that into account.

Yea, I've kinda figured that out. It's paired with two 200w full spectrum LEDs during flower. Only the LEDS during veg

Atleast that's how I'm going on this round. We'll see what happens, this is my first grow with ANY of the lights I have. I may add a second CMH into my massive hood....

Edit - come to find out that it's only a 4x4 tent as well

 

[coreywebster]

Yea, I've kinda figured that out. It's paired with two 200w full spectrum LEDs during flower. Only the LEDS during veg

You'd be better vegging with the 315 cmh. One of my veg tents is a 4x4 and has one in and they veg great, even the lower kelvin bulbs.

When it comes to flower, if you plan on filling that tent, you'd want 4 LED bars around 60-75w each around it..

Though you can always do a run with what you have for now..

But 3x3 is 9square feet.
4x4 is 16.. it's nearly double the footprint

 

[coreywebster]

Obviously I'm talking about ideal situations.
No harm in running less than ideal for a crop or two