-
ICMag with help from Landrace Warden and The Vault is running a NEW contest in November! You can check it here. Prizes are seeds & forum premium access. Come join in!
CMH vs LED vs HPS
- Thread starter Gerardbutler79
- Start date
exoticrobotic
Well-known member
A couple of weeks under CMH.
They are much warmer and happier.
23 days veg total.
Have a good weekend all
they do look happyA couple of weeks under CMH.
They are much warmer and happier.
23 days veg total.
View attachment 18813456
Have a good weekend all
I love how my plants respond to CMH. I'll never change those in veg.
Chimera LED
Chimera LED
exoticrobotic
Well-known member
They've had a couple of feeds and getting heat from above rather than from below now
Me too. Nice n lush.
I'm considering getting a 250 hps to go in there along with the 315 cmh for flowering.
YellowCanaryConsulting
Active member
Did a side by side and you could easily tell which plants were closer to the opposite lights. There was a steady gradient in quality as they got further away. Maybe you just suck at hid and are happy with trash. Lights used in this test were Spider Farmer and Dimlux.
Anyone who thinks Athena grows bad weed is a retard. It's official. I grow amazing weed with Athena. You're obviously retarded. Otherwise you'd talk shop. I can't find anyone defending leds willing to talk shop. They all talk brand names and useless Bruce Bugbee nonsense.
Try asking basic questions around here like, 10000K, vs uva vs uvb for finishing. All the led guys are like "what?". That's how you know, they grow trash. But hey they'll sell you a uva tube and some supplemental reds for a few hundred per unit. The markets sector saturates in expansive supplemental ads-ons definitely grow amazing weed without the add-ons though, right.
RobFromTX
Well-known member
I was just eyeing this system.
iPower Ceramic Metal Halide Grow Light Kits, High-Reflectivity Aluminum Hood and 120-240V Ballast with Full-Spectrum CMH Hydroponic Lamp System, 3100K, 315W
I already use their hps line. Does anybody know how much coverage it gives? They dont list it
Ive been talking plenty of shop. If you decide you want to go back in the thread and review it. I value cmh as well as leds but i do think 1000w hps are very inefficient at this point. Calling someone a retard on here is immediately going to put someone on the defense and make this not about the data or product. Calling Bugbees work “nonsense” is pretty silly imo as well. He works for NASA. He has more accolades in horticulture than most human beings ever will. Part of their research was on uva uvb and uvc. No differences in yield, cannabinoid or terpene tests. They showed all of the data and their experiments in chambers. Its as detailed and precise as one can accomplish. Also, many leds come with too much red in their spectrum, not sure why you would need to supplement.
what the fuk do u consult???
Its in his name but id be real afraid to take that advice!
Cactus Squatter
Well-known member
My green Mexican pheno went 12 and my purple columbian leaner went 16.
There are always gonna be some people that think shit smells like roses lol. As I always say test it yourself.
That will work fine.
They've had a couple of feeds and getting heat from above rather than from below now
Me too. Nice n lush.
I'm considering getting a 250 hps to go in there along with the 315 cmh for flowering
That will work fine.
goingrey
Well-known member
315 with a standard rectangular hooded reflector... they say 4ft x 4t, I'm guessing 3ft x 3ft is closer to the truth.
RobFromTX
Well-known member
thats what i figured. id need to buy 2 systems. much thanks
Shit growers and/or shit genetics grow shit weed. Good growers using good genetics can use any of the lights and get good results if they know what they are doing... LEDs just happen to be the ones that are constantly improving and becoming more efficient...
Main problems with LEDs these days is that they are too strong and need to be turned down to veg plants, otherwise they get stressed. Ive been using them 10+ years and they have become much stronger in that time. Also used HPS, MH and CMH all to good effect.
VG
Main problems with LEDs these days is that they are too strong and need to be turned down to veg plants, otherwise they get stressed. Ive been using them 10+ years and they have become much stronger in that time. Also used HPS, MH and CMH all to good effect.
VG
BuckeyeGreen
Well-known member
I just did my first grow with the Grow Light Science Pro Grow 640 in a 4x4 tent. I love the dimming ability on this light. It’s very helpful for different stages of growth.
I grew in a very fast draining soil mix called 5-1-1. 5 parts composted bark fines, 1 part peat and 1 part perlite. I only used one nutrient Dyna Gro Foliage Pro at one teaspoon per gallon used at every watering. It’s impossible to over water with this soil mix. I had absolutely no Cal/Mag issues and the plant was put in the flower tent under vegged by about a month. It was about 15inches tall and pretty scrawny. I didn’t intent to do much with the plant so I kind of put it off to the side.
I only raised it about 4 inches off the floor on a plant stand. I didn’t raise it to the height of he canopy. The top of the plant was nearly 3 feet from the light. It started to grow very quickly and was soon even with the canopy. I did no training and it grew straight and strong with big buds at the end of each branch and good size buds all the way to the bottom branches.
It looked like the perfect, classic looking marijuana plant. It was a Big Buddha Blue Cheese. I grew two other Blue Cheese plants in organic soil, fully vegged and topped multiple times. The under vegged, none topped plant only yielded 4 grams less than the the fully vegged and topped plants. All of the buds on the plant in the 5-1-1 mix were big. Almost no small or popcorn buds. The buds are heavily resin coated.
Smoke is very smooth, they look beautiful, have good flavor and nice aromas. The high for me is perfect. Very functional, pain killing and a happy state of mind.
I have no doubt that there are better light set-ups out there that do a better job and if grown under those lights maybe the plant I just described would be much better.
I grew many years under HPS with good Eye Hortilux bulbs with great results so I know the difference.
Maybe those types of bulbs are much better. Where I have a problem is saying that LEDS produce mostly junk. All of my plants grew very healthy with no issues at all and I’m enjoying the results. I don’t know. It’s kind of like watching an NFL game where you watch a player clearly catch a ball and then the official in the booth explains to you why you shouldn’t believe your lyin eyes.
I’ve been smoking since 1974 and I believe I have a little bit of experience with smoking pot. Maybe though I just have terrible taste, don’t know what good pot is and when I’m enjoying my high from the LED light buds maybe I’m just absentmindedly playin with my dick and that’s making me happy.
I grew in a very fast draining soil mix called 5-1-1. 5 parts composted bark fines, 1 part peat and 1 part perlite. I only used one nutrient Dyna Gro Foliage Pro at one teaspoon per gallon used at every watering. It’s impossible to over water with this soil mix. I had absolutely no Cal/Mag issues and the plant was put in the flower tent under vegged by about a month. It was about 15inches tall and pretty scrawny. I didn’t intent to do much with the plant so I kind of put it off to the side.
I only raised it about 4 inches off the floor on a plant stand. I didn’t raise it to the height of he canopy. The top of the plant was nearly 3 feet from the light. It started to grow very quickly and was soon even with the canopy. I did no training and it grew straight and strong with big buds at the end of each branch and good size buds all the way to the bottom branches.
It looked like the perfect, classic looking marijuana plant. It was a Big Buddha Blue Cheese. I grew two other Blue Cheese plants in organic soil, fully vegged and topped multiple times. The under vegged, none topped plant only yielded 4 grams less than the the fully vegged and topped plants. All of the buds on the plant in the 5-1-1 mix were big. Almost no small or popcorn buds. The buds are heavily resin coated.
Smoke is very smooth, they look beautiful, have good flavor and nice aromas. The high for me is perfect. Very functional, pain killing and a happy state of mind.
I have no doubt that there are better light set-ups out there that do a better job and if grown under those lights maybe the plant I just described would be much better.
I grew many years under HPS with good Eye Hortilux bulbs with great results so I know the difference.
Maybe those types of bulbs are much better. Where I have a problem is saying that LEDS produce mostly junk. All of my plants grew very healthy with no issues at all and I’m enjoying the results. I don’t know. It’s kind of like watching an NFL game where you watch a player clearly catch a ball and then the official in the booth explains to you why you shouldn’t believe your lyin eyes.
I’ve been smoking since 1974 and I believe I have a little bit of experience with smoking pot. Maybe though I just have terrible taste, don’t know what good pot is and when I’m enjoying my high from the LED light buds maybe I’m just absentmindedly playin with my dick and that’s making me happy.
ProperCannaCo
New member
This is such GOLD. We transitioned from Dimlux HPS' to Fohse A3i's and have experienced everything you described. We are still battling but making strides. Please see my thread regarding our latest issues and let me know your thoughts. It sounds like you've been through the trenches enough to help us diagnose where we may be shooting ourselves in the foot. At any rate, this post alone really hit home when you referenced the "Add more cal-mag and you'll be fine" nonsense that we were repeatedly told by countless growers, nute companies, and lighting manufacturers.
3x3 at best. 315 will not cover a large area. You would like the results better using a dual 315. You could still use just 1 315 bulb. I use 3 cmh fixtures in veg. 1 of them is a dual light with just 1 bulb on.
Last edited:
RobFromTX
Well-known member
Appreciate the info. Im just gonna have to save some beans and get a dual system going. cmh does seem to be the winner in this thread
