All BS set aside CMH yields

[MichiganMedGrower]

MMG,
First...thanks for the very complete response. Just the info I needed. In my veg area (under construction) I'll have over 8' of headroom. So a vertical reflector would fit right in...just not one that's 4' wide! lol

I live in a cool climate so the heat produced is a plus. Saves me heating cost. I'm planning on adding two more 315s to my bloom room...but there, I may have to go horizontal.

Will definitely check out the sun and you even gave me a source for them! Much appreciated.
JD

Very welcome.

 

[MichiganMedGrower]

Here is a pic of my flower room with 2 sun system blockbusters with Hortilux 600w super hps and 1 sun system open vertical remodel reflector with a Phillips 315 3100k.

Figured we all love pics!



The blockbusters are about 2’x2’ and the remote LEC is 18”x18” and about 14” tall I think.


By the way. I tested many combinations and each light individually with 3 clone runs each. I even included the 600w Hortilux Blue mh.

2 hps to one 315 gave me the best results. In my space 1 315 alone is not powerful enough to keep up with the 600 super hps.

But I had noticed the buds in the overlap were bigger and frostier so I tried all the combinations last year.

 

[JohnDee]

MMG,
Very nice...healthy looking and the bottom ones are budding up nicely. So you use the 315 as a blue light/uv supplement to the HPS. Old school. Been using a mix of HPS and MH since the 80s.

Peaked at your profile. Canoed the boundary waters several times. Lovely up there...but I'm too old to be portaging a 75 pound canoe. I have relatives in the UP. Been a few years since I was up there. I'm a Minnesota native.
Take care and thanks for the pix...
JD

 

[MichiganMedGrower]

MMG,
Very nice...healthy looking and the bottom ones are budding up nicely. So you use the 315 as a blue light/uv supplement to the HPS. Old school. Been using a mix of HPS and MH since the 80s.

Peaked at your profile. Canoed the boundary waters several times. Lovely up there...but I'm too old to be portaging a 75 pound canoe. I have relatives in the UP. Been a few years since I was up there. I'm a Minnesota native.
Take care and thanks for the pix...
JD

I would like to kayak up at picture rocks in the up.

But I may go to traverse city and play around the sleeping bear dunes first.

Thanks for the compliment.

 

[SunPlix CMH]

Hi Guys,
Sorry to barge in...and I haven't even read the entire thread yet. I have always been a MH devotee and recently picked up a used 315w LFSW ballast. It has a switch on the side to run the 210 watt bulb.

Never used either the 315 or the 210 but am thinking of going with a 210 watt for use in a 3x3 veg tent. Would that be too intense?
Cheers,
JD

315W is perfect for 3x3.

 

[JohnDee]

315W is perfect for 3x3.

Thanks...others have said that too. Was considering a 210 watt since I have the ballast but not bulb yet. Just to save some power and lower heat...might a 210 do the job? I know growth would be a little slower...
JD

 

[SunPlix CMH]

This is a 4x4 tent with a 400W dimmable CMH grow light.

Thanks...others have said that too. Was considering a 210 watt since I have the ballast but not bulb yet. Just to save some power and lower heat...might a 210 do the job? I know growth would be a little slower...
JD

Heat is not a problem in the tent if you use 315W CMH.
If you have 210W CMH ballast, you can use the 210W CMH bulb for the veg, but not enough for flower. If you don't have any CMH ballast, you can consider this one. https://www.sunplix.com/product/cmh-315wk-lfsw-knob-dimmable/

 

[coreywebster]

It would work John. I vegged my 4x4 with a 315 in summer months and was more than happy. I obviously wouldn't flower under that though.

Thanks...others have said that too. Was considering a 210 watt since I have the ballast but not bulb yet. Just to save some power and lower heat...might a 210 do the job? I know growth would be a little slower...
JD

 

[JohnDee]

If you have 210W CMH ballast, you can use the 210W CMH bulb for the veg, but not enough for flower.

OK thanks...I don't know why I'm being so indecisive about lighting. I usually just pick something and go with it!

Yes I have one of the little black box...switchable Philips ballasts...and have an LED for flowering...so the 210 (if I go that way) would be just for vegging.

It would work John. I vegged my 4x4 with a 315 in summer months and was more than happy. I obviously wouldn't flower under that though.

Thanks Corey...appreciate the input.
JD

 

[hummous]

Good question. I know in the spot i visited recently the all cmh veg room (on an 18-6 photoperiod)....the temps were VERY manageable. About the same as an all t5 veg room...maybe SLIGHTLY more. In the flower room and with 315 watter cmh lamps supplementing Gavita and Nano doubles...i couldnt tell ya. His mini split handled it fine. But i didnt ask him if he had to upgrade his split to accommodate the added cmh fixtures.

1991, reviving this post to possibly get some answers. My flower room is 16’x18’, 7’8” ceilings, sealed, controlled and has a ac unit in need of cooling. I was advised to get the nanolux 315s. One, because they’re cmh and not hps. Two, extremely efficient and effective. Three, I can control timing/wattage via smartphone. I’m worried because I’ve been advised by friends to use 1000w hps to get the yield I want. Not only am I concerned with yield, but also quality and efficiency. I have the capability of running 21-315s or 8-1000s in my room if that gives you an idea of what my setups could be. I’m new to farming but have an experienced partner.

 

[SunPlix CMH]

1991, reviving this post to possibly get some answers. My flower room is 16’x18’, 7’8” ceilings, sealed, controlled and has a ac unit in need of cooling. I was advised to get the nanolux 315s. One, because they’re cmh and not hps. Two, extremely efficient and effective. Three, I can control timing/wattage via smartphone. I’m worried because I’ve been advised by friends to use 1000w hps to get the yield I want. Not only am I concerned with yield, but also quality and efficiency. I have the capability of running 21-315s or 8-1000s in my room if that gives you an idea of what my setups could be. I’m new to farming but have an experienced partner.

We have 315W, 630W and 1000W CMH grow lights. Which one should be selected mainly depends on your grow room dimensions.

 

[SLAMTHIS]

1× 315w LEC
Phllips bulb
3x3 tent
6 grows
G13 haze, Green Crack, GG#04
Scrog wall-wall, non-manipulated
100% perlite, 70/30 coco, Soil/Organic
Drain2Waste - Autopot, Manual feed
Skill level : 6/∞
Location: Australia (subtropical)

Total Dry yield (Oz): 12, 9, 9, 10, 0, 9

Inconclusion:
Little difference in yield between 1 plant (9oz) or 5 plants (10oz).. except 1 plant was a pleasure to harvest compared to 5!
Environment/seasons seem to be the largest contributing factor for me. This is most evident with the case of the total loss. Coroners report concluded that all 4 G13 fatalities were a result of inexperience × overconfidence × 8days over 37°c/102°F (no air con) × moving house. Age of deceased: Wk3Flwr

 

[SunPlix CMH]

Good reflector brings you higher yield.

 

[gwheels]

I am vegging with a 942 but the problem with CMH vs COB and Quantum is the fucking bulbs. The 942 i have the glass jacket got loose on the metal socket when i installed it.

I am not gentle on shit but geeze a 150 dollar phillips bulb that is all loose and goofy feeling. They grow frosty buds but i had bulbs. I am going to switch out to all Quantum boards and strips and cobs and never have to deal with bulbs again.

But that is my 2 cents. Like I said they grow stellar weed.

 

[SunPlix CMH]

Probably you purchased cheap CMH lights?
We sold thousands of CMH lights with Philips 930 and 942 T9, T12 bulbs, didn't find even one loose bulb.
Many of our customers like CNH more than LED. Please see the two screenshots.

 

[SunPlix CMH]

942 bulb works better for both veg and flower than 930 if it is correctly used.

 

[MichiganMedGrower]

942 bulb works better for both veg and flower than 930 if it is correctly used.

Why? In my experience the 3100k already grows looser and leafier buds. Also prevents a good stretch for max yield. More blue would be counterproductive to yield and bud quality in my opinion.

My best results were combining it with hps.

 

[Flagg420]

Hey dude,
While a have a 315 guy online here...mind if I ask you another question? Looking for opinions on mounting. The Greenbeams vertical 315 seems very popular and is quite pricey. Most are horizontal. So that's my question...which orientation is best...or does it matter?
JD

More important is the bulb type... some are (U) Universal, and can mount anyway. Some bulbs are not approved for horizontal use... (I assume its a matter of strength of the inner parts that get hot while fighting gravity)

Check the printing on the bulb.... if its universal, mount however you please.

If you have the ballast and need a fixture, consider just using one you might have, or can get cheap for a MH/HPS and tossing an adapter on it... worked wonders for me.

https://www.amazon.com/gp/product/B0759TVWG9/ref=oh_aui_search_detailpage?ie=UTF8&psc=1

 

[SunPlix CMH]

Why? In my experience the 3100k already grows looser and leafier buds. Also prevents a good stretch for max yield. More blue would be counterproductive to yield and bud quality in my opinion.

My best results were combining it with hps.

If you can over power the 942 bulb, you will get better result.

 

[MichiganMedGrower]

If you can over power the 942 bulb, you will get better result.
View attachment 4185701

What are you saying and trying to show here please?