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LED and BUD QUALITY
- Thread starter Tropical Sun
- Start date
[Maschinenhaus]
Active member
Seoul Semiconductor, yes it looks like it, no one knows the exact layout of this lamp except the manufacturer?
From Bridgelux, Osram and Nichia SMD we tried to recreate this, UV-A worries me as it ages the remaining components prematurely and these chips fail faster.
We have incorporated the near UV spectrum only from about 380nm, which can be switched on for simulated midday and then emits correctly at a higher intensity like the range around 500nm.
The answer lies in the intensity and the irradiation time. The stretch brake was a chance discovery in eliminating the "Cyan Gap". Green spectrum is also enormously Important and often underestimated .
Whether landraces or hybrid cultivars, cultivars from cool mountainous regions with lots of natural UV or cultivars from the warm and humid lowlands will respond the same way, only time will tell? The terpenes are also enormously influenced by the soil, nutrients and minerals. The maturity after harvest, there is also a lot happening with hemp. The cannabis in the photo was a year in the jar to maturity.
Natural daylight in the summer
From Bridgelux, Osram and Nichia SMD we tried to recreate this, UV-A worries me as it ages the remaining components prematurely and these chips fail faster.
We have incorporated the near UV spectrum only from about 380nm, which can be switched on for simulated midday and then emits correctly at a higher intensity like the range around 500nm.
The answer lies in the intensity and the irradiation time. The stretch brake was a chance discovery in eliminating the "Cyan Gap". Green spectrum is also enormously Important and often underestimated .
Whether landraces or hybrid cultivars, cultivars from cool mountainous regions with lots of natural UV or cultivars from the warm and humid lowlands will respond the same way, only time will tell? The terpenes are also enormously influenced by the soil, nutrients and minerals. The maturity after harvest, there is also a lot happening with hemp. The cannabis in the photo was a year in the jar to maturity.
Natural daylight in the summer
JollyGreenDreams
New member
Very interesting information thread. Based on my own experience, the best results have come from using a combination of H.I.D. and L.E.D.
Corpselover Fat
Active member
Well I for one really wouldn't want sun light in my grow tent. It wouldn't be suitable at all.
S
sallyforthDeleted member 75382
I agree JollyGreenDreams as I’ve found the combination of HID and LED works really efficiently and I have a UVB tube in the centre for last 3/4 weeks of flower.
Ca++
Well-known member
Cannabis is one of the better adapted plants, if the studies into blue and red quota's are correct. Each has found that more than a 40% share of the total light is detrimental.
Some other types of plant like blue, while others are hindered by it. It seems the blue and beyond into UV can cause problems for plants in general. The highly charged photons doing more damage than good, in some cases. Adding weight to the long standing suspicion of resin being a means of protection from UV. Not just drying out.
Looking at analogues of cannabis, blue is probably bad. However tests suggest a reasonable (sun like) share is alright. The analogues don't have the resin. Though I'm not supporting the idea that UV is useful for resin production, there does seem to be some evidence that resin aids with UV protection
I did alright with sodium for years. Hg free one's seemed no worse (Hg is mercury, a metal used to form the plasma, which gives a strong UV spike). Sodiums are pretty much a lump of orange. We accepted the stretch as we knew no better, but there is no ignoring the saturation effect of a monochrome light. I surmise this led to deeper penetration. Which we now look to green for, as it also has less capturing it on the way through.
Sun is nice, and we keep heading in that direction with every improvement of LED lighting. Starting with burple, and leading to today, where people are chucking in everything, if they can.
Some other types of plant like blue, while others are hindered by it. It seems the blue and beyond into UV can cause problems for plants in general. The highly charged photons doing more damage than good, in some cases. Adding weight to the long standing suspicion of resin being a means of protection from UV. Not just drying out.
Looking at analogues of cannabis, blue is probably bad. However tests suggest a reasonable (sun like) share is alright. The analogues don't have the resin. Though I'm not supporting the idea that UV is useful for resin production, there does seem to be some evidence that resin aids with UV protection
I did alright with sodium for years. Hg free one's seemed no worse (Hg is mercury, a metal used to form the plasma, which gives a strong UV spike). Sodiums are pretty much a lump of orange. We accepted the stretch as we knew no better, but there is no ignoring the saturation effect of a monochrome light. I surmise this led to deeper penetration. Which we now look to green for, as it also has less capturing it on the way through.
Sun is nice, and we keep heading in that direction with every improvement of LED lighting. Starting with burple, and leading to today, where people are chucking in everything, if they can.
CMH/LED FTW.....
exoticrobotic
Well-known member
CMH plus LED is ok. Nice large buds with small stretch with good psychoactivity but i miss the extra bass i used to get with a good old sont agro hps.
Seriously considering going back to hps. I prefer the orange glow too. Reminds me of the old UK streetlamps.
Seriously considering going back to hps. I prefer the orange glow too. Reminds me of the old UK streetlamps.
Corpselover Fat
Active member
Yeah, it was so great not seeing plant problems.
Brother Nature
Well-known member
Evolutions a bitch aye…
[Maschinenhaus]
Active member
In the beginning we only had MH and NDL, I started with 1,000W, that's how they had sold it to me in my inexperience. I quickly changed to 800W, then tried 2x 400W and 600W.
I have always grown outdoor plants during this time, my old Durban I have made so indoors and outdoors 25 years to an IBL. Then came PL-L fluorescent tubes, a special T5 system with a lot of UV-A and UV-B, extremely red to IR. It was a purchase when I was in the USA, California and looked at the business there. Brand new at the time, it was not good, a bad buy, but the normal PL-L in the HO or HE version continued to bring the best grass indoors, almost like outdoor.
With the first LED Sytem from Cree CXB COB was the first run only bad, like a beginner I felt. Then came a serious accident and long hospital and professionally long time off, so I read many books on the subject of light spectrum, conducted mail correspondence with researchers such as Prof. Bugbee and read even more books.
In the phase I built mainly with high CRI COB like Vero29, Citizen CLU048 and tried to find limits at the output. Played with spectrum in all directions. Then came the Bridgelux Thrive LED as 500mm x 18mm strips, except for UV and IR perfect, especially if you still Nichia or Soul Semis installed.
No more Cyan Gap, balanced starting with Blue to Green, Yellow etc., this unit got some Royal Blue to simulate daylight like it is in summer with cloudless sky. With the result that the indoor performance was identical to the Adjust A Wing Hellion CMH with 4,200 Kelvin. The D.I.Y. LED has about 4,500 Kelvin for the entire cycle and is dimmable. The intensity of the LED can be brutal, electrical efficiency is negligible because it counts only the efficiency of cannabis (and my chili cultivation).
Daylight summer under cloudless sky at noon.
Here the morning and the evening.
I have always grown outdoor plants during this time, my old Durban I have made so indoors and outdoors 25 years to an IBL. Then came PL-L fluorescent tubes, a special T5 system with a lot of UV-A and UV-B, extremely red to IR. It was a purchase when I was in the USA, California and looked at the business there. Brand new at the time, it was not good, a bad buy, but the normal PL-L in the HO or HE version continued to bring the best grass indoors, almost like outdoor.
With the first LED Sytem from Cree CXB COB was the first run only bad, like a beginner I felt. Then came a serious accident and long hospital and professionally long time off, so I read many books on the subject of light spectrum, conducted mail correspondence with researchers such as Prof. Bugbee and read even more books.
In the phase I built mainly with high CRI COB like Vero29, Citizen CLU048 and tried to find limits at the output. Played with spectrum in all directions. Then came the Bridgelux Thrive LED as 500mm x 18mm strips, except for UV and IR perfect, especially if you still Nichia or Soul Semis installed.
No more Cyan Gap, balanced starting with Blue to Green, Yellow etc., this unit got some Royal Blue to simulate daylight like it is in summer with cloudless sky. With the result that the indoor performance was identical to the Adjust A Wing Hellion CMH with 4,200 Kelvin. The D.I.Y. LED has about 4,500 Kelvin for the entire cycle and is dimmable. The intensity of the LED can be brutal, electrical efficiency is negligible because it counts only the efficiency of cannabis (and my chili cultivation).
Daylight summer under cloudless sky at noon.
Here the morning and the evening.
S
sallyforthDeleted member 75382
If you get the right UVB tube and not the LED version it works really well. I know it works by my results and there is a big difference in with and without. I’m lucky I can do side by side but now I wouldn’t flower without them. It’s not only cannabis being flowered with them but all manner of fruit, herbs and veg to get more vitamins and essential oils from them. GW pharmaceutical here in the U.K. use them in the greenhouses to produce more resin and yield more medicine. The ones I use are UVB310 from migro.
iStruggle
Active member
Interesting thread. Never grown under anything but an LED. Would like to try HPS in the winter to eliminate the need for a heater in my tent. Wife wont let me have one because she caught wind of the fire hazards of HPS. Like a heater is any better 
In my reading ive never read a single professional/commercial opinion that said LED was better than HPs, only that they were much more energy efficient. As with any business, there’s always the cost savings route where a lot of decisions are based to save money at the cost of quality.
With all that said, great plants can be grown under both.
In my reading ive never read a single professional/commercial opinion that said LED was better than HPs, only that they were much more energy efficient. As with any business, there’s always the cost savings route where a lot of decisions are based to save money at the cost of quality.
With all that said, great plants can be grown under both.
Hmm.. good direction, but this is a Bud under LED thread, so stick to it..
The reason we put so much effort in those debates is because they are the most critical aspects of growing.
Nutrition, VPD, Controlled Stress and etc have their origins in the lamps or soil or water or air, so before you light stress your plants, make sure you have a lamp that can do it haha
But seriously, these parameters only make up for some of the grow
You'll get killer buds at 30rh and 60-70rh also
Again with temp and nutrition switches, it's not that critical if you know basic concepts of gardening and specifically weed gardening
Genetics play a key role here more then any other factor, in my off time from here and in my endless effort to realize why quality has gone so downhill, I took a step back from blaming LEDs for everything... Good genetics will reach high potential under any light (in terms of trichomes and effect) that I also saw in my led grows...
I still hold the opinion that HIDs are better overall lights in terms of producing better results across the board
I have yet to smoke a LED grown Bud that was worth something.
I saw a member here, @linde I believe, that posted a response in a thread about being in a dispensary and getting 28% thc weed there that was a joke...
This is part of the problem, more people here that grow latest genetics and having medicore results made me understand that the LIE is everywhere.
You could have the best genetics in the world and it will still be boof when grown poorly. Healthy plants all through flowering will determine the quality at harvest under any light. Stress kills quality. The more there are the more problems we encounter.
Nah man, good genetics, even grown poorly will bring out good results, effect wise yes ? Not grow wise maybe, but the subject is Bud quality so I'm aiming at that
Stress kills quality of what ? The leaves ? We are after trichomes here, stress induce them
People induce problems, the best grows are basic ones, no human interference for things that don't require them.
I got the best results when keeping it as simple as can be, to the point of not using temp/rh meters, or even fans or blowers
Look at nature, study it, you will do just fine.
LHC
Well-known member
You probably all seen the HLG LED/LEC comparison over at growweedasy?
www.growweedeasy.com
I find the results interesting. LEC wins on terps, and LED on THC.
This grow I will use HLG LED for veg+stretch and CMH for the rest of flowering.
LEC vs LED Grow Lights: Side-by-Side Cannabis Grow Journal | Grow Weed Easy
by Nebula Haze This grow journal from 2020 features two indoor cannabis gardens that are identical except for one thing: the grow light! See a match-up between LEDs vs LEC grow lights. If you’re unfamiliar, LEC is a brand name by Sun System. LECs are also known as CMH grow lights. I have to...
www.growweedeasy.com
I find the results interesting. LEC wins on terps, and LED on THC.
This grow I will use HLG LED for veg+stretch and CMH for the rest of flowering.
lol, you keep telling yourself that.. The quality of our weed has a direct relationship with our growing abilities. Doesn't matter what genetics you have if you can't 't grow it well. Most issues in the garden are caused by the grower. If the plants are stressed enough all you have at harvest is boof.
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