DinoTech
Member
Denial, read the post right before yours. Contact info is on there . Ill take their word over your jackassery any day brah!
This for all the LED haters! Is that blurple I see kicking HID butt?
- Thread starter DinoTech
- Start date
growingforfun
Well-Known Member
Its not denial, its first hand experiance.
I've told you, I've used about every kind of led. From old school burple, several kinds of multi band UFOs, really. This isnt something I speak on from a position of zero experiance.
growingforfun
Well-Known Member
Trust me, I want LEDs to work well. The burples just dont.
The white LEDs work fine.
If your going to push LEDs, at least push ones that work better or at the minimum as good as hps
The white LEDs work fine.
If your going to push LEDs, at least push ones that work better or at the minimum as good as hps
DinoTech
Member
OK lets not argue so much. I actually feel bad I just wanted to share. On that note. crappy cell phone cameras dont help. I dont use one of those old school red and blue lights. I use a full spectrum but its not white either. it has some color. Mine emits a purplish hugh but its not that bad to my eyes. I borrowed a buddies dslr camera. this camera takes the best as I can take a pic as close to what i see. one pic is in veg mode and the other is with bloom cobs on.
Each one draws 405 watts on full bloom mode. Can show a pic of the watt meter if you want. They are not that bad I am telling ya they work great for a 450 dollar light and will definitly out grow an equivalent HPS watt light
Each one draws 405 watts on full bloom mode. Can show a pic of the watt meter if you want. They are not that bad I am telling ya they work great for a 450 dollar light and will definitly out grow an equivalent HPS watt light
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a mongo frog
Well-Known Member
Yea we're definitely going to need that. Also if you wouldn't mind can we get a dye test or at least a visual on the cap and maybe a root bend?
OP,
Not comparing here.
Just a different point of view.
These were 6 weeks old from seed.
Flipped at 5 weeks from seed.
600watts Hps from sprout to harvest.
Light was always at 6 feet high too.
All the same seeds.
A few days before harvest.
I really do believe cooler canopy temps have a lot to do with LED's numbers.
I changed from LED to hps.
I really want the LED industry to pick up it's game first.
There is way too much product variety, DIY going on, and the price for a pre-built unit is way too high.
I'm not suggesting this grow is a good example either. Only showing that stretch etc isn't really all that true with hps.
Also this was an El cheapo "Growlush" bulb and ballast.
Ballast, bulb, and air cooled hood cost me 200 AUD.
LED really need to compete on price watt for watt, before it's worth it Imo.
Not comparing here.
Just a different point of view.
These were 6 weeks old from seed.
Flipped at 5 weeks from seed.
600watts Hps from sprout to harvest.
Light was always at 6 feet high too.
All the same seeds.
A few days before harvest.
I really do believe cooler canopy temps have a lot to do with LED's numbers.
I changed from LED to hps.
I really want the LED industry to pick up it's game first.
There is way too much product variety, DIY going on, and the price for a pre-built unit is way too high.
I'm not suggesting this grow is a good example either. Only showing that stretch etc isn't really all that true with hps.
Also this was an El cheapo "Growlush" bulb and ballast.
Ballast, bulb, and air cooled hood cost me 200 AUD.
LED really need to compete on price watt for watt, before it's worth it Imo.
growingforfun
Well-Known Member
Perhaps. But how do you measure equivalent? Cost or watts? If it's by cost the hps will win, you could get 2000 watts hps, with that 450$ with nice hoods and the best bulbs on the market, and you could easily yield 2 lbs.
Or is it watt for watt? The Samsung strips or quantum boards would be better watt for watt than those LEDs you've got and cost about the same also.
You talk about science a lot, but you ignore than we have done the research also, and likely for longer than you have.
The lights you have will work fine but there's a lot of reasons people like me will come in an point out the fact they arnt all that good. Even the LEDs I was buying 8 years ago worked alright. I'm def not saying they wont grow plants. Just I wouldn't claim they are better than HPS.
nfhiggs
Well-Known Member
Its just flat out wrong, or its based on outdated data. Todays high efficiency white LEDS are far more than 30% efficient, reaching well over 200 lumens per watt - that's 33% more light per watt than HPS - even when converted to a PAR value.
DinoTech
Member
Guess its just a matter of opinion then and I am ok with that because we are interpreting the results differently. Happens all over the world. It is human nature.
growingforfun
Well-Known Member
Where are you seeing over 200 lm/w the F strips are saying 180 lm/w on the website
MichiganMedGrower
Well-Known Member
Who cares if its purple or white. It still beats HID! Its the technology thats important. but you will just want to complain about something, get off the purple issue. its about LED's (This is NOT from youtube richard)
Academic research into HPS vs. LED for cannabis cultivation
Cannabis cultivators find themselves in a dilemma called HPS (high pressure sodium) lighting versus LED (light emitting diode) lighting. On the one hand, HPS has been around in agriculture for a long time and has proven that it can successfully grow a wide variety of plants. On the other hand, LED, as the latest entrant to the horticultural lighting market is living up to its hype. What cannabis growers are concerned with are quick growth cycles of cannabis plants that yield many large flowers, containing high levels of THC (Δ-9-Tetrahydroannabinol), CBD, and other valuable secondary metabolites. Furthermore, growers need a lighting system that produces consistent results time after time as well as proven light recipes. Up to recently, no academic research had been done to compare the capabilities of these two lighting sources for growth of cannabis.
Photo taken at MJardin, Denver, CO. Plant grown under the Valoya NS1 (sunlight) spectrum.
An academic research titled ‘The Effect of Light Spectrum on Cannabis Sativa Morphology and Cannabinoid Content’ (G.Grassi, G.Magagnini, S.Kotiranta) has been presented at the Cannabinoid Conference in Cologne in September 2017 which presented a two-year long comparative study of HPS versus LED lighting for cannabis cultivation.
The results show that the morphology of Cannabis sativa can be manipulated with light spectra. Plants under HPS treatment were taller and had more total biomass dry weight than treatments AP673L and NS1 (spectra by Valoya, the Finnish manufacturer of LED grow lights). HPS light spectrum is low in short wavelength irradiation (blue and UVA) and rich in green, yellow, red and IR in 800-1100 nm irradiation. This type of wavelength combination resulted in longer internodes and therefore taller plants with more stem dry weight. As for the compound accumulation in the flowers, treatments NS1 and AP673L had higher CBD and THC concentrations than HPS treatment. Treatment NS1 had the highest CBG Level. Spectrum NS1 is rich in short wavelength irradiation (blue and UVA) and had the highest R:FR ratio of all tested spectra. In addition to high cannabinoid content, spectrum NS1 enhanced the compact growth habit of the measured plants. The research suggests that the lower wavelengths, blue and UVA, could contribute to the higher cannabinoid yield in treatment NS1 compared to AP673L and HPS, respectively. In the rounds of the research the amount of THC produced under LEDs ranged from 26-38% more than compared to the HPS treatment.
Three light sources were compared to each other. Spectra of the used light sources from left to right: HPS, AP673L and NS1.
Plants under LED spectra were more compact and produced more cannabinoids than the HPS light source.
For more information on this research please visit Valoya (booth #523) at the upcoming Marijuana Business Conference and Expo in Las Vegas. One of the paper authors, Ms. Kotiranta will be present at the booth.
For more information:
Valoya Oy, Finland
Tel: +358 10 2350300
sales@valoya.com
www.valoya.com
Publication date: 11/9/2017
Very interesting. But there are tests out there showing cmh producing more canabanoids than led.
I’m sorry I don’t have links saved to this phone. I did my research a few years ago and did not save into new Phone.
Also. A Hortilux super hps has much more blue spectrum than the hps shown here.
There are so many more variables I don’t think it is truly determined yet.
For more info look into the university of Michigan.
They are extensively testing individual colored diodes on specific agricultural crops.
In time there will be plant specific grow lights in greenhouses for example.
Thanks for clearing that up then.
Can you give me some scientific data?
I'm not doubting what you say. Just want some good reading material.
I want to know how.
MichiganMedGrower
Well-Known Member
I know led will take over eventually. I have not made the switch yet.
But,
These are terrible results for a dual ended 1000.
I get a gram per watt and 1.5 lbs from a single ended 600 hps.
And I am sure not a pro master grower. I have only run a perpetual medical 12-24 plant garden for 4 years now.
Pro growers are doing 3 lbs with the de.
I assume the canabanoid content would be appropriately higher if the hps was used properly as well.
growingforfun
Well-Known Member
https://www.digikey.com/catalog/en/partgroup/f-series-gen3/67179Thanks for clearing that up then.
Can you give me some scientific data?
I'm not doubting what you say. Just want some good reading material.
I want to know how.
Here's a link to the strips, you can Google them specifically for grows and other relevant info
I dont have any other links unfortunately
nfhiggs
Well-Known Member
Thats at test current, you gain ~10% when you reduce the current by 50%. The Q strips at test current are 202 lm/W in 4000K:
https://www.samsung.com/led/support/tools/engine-calculator/
Cheers matehttps://www.digikey.com/catalog/en/partgroup/f-series-gen3/67179
Here's a link to the strips, you can Google them specifically for grows and other relevant info
growingforfun
Well-Known Member
What about in 3000k for flowering? Most of us mostly care about flowering, veg is a easy low watt problem to solve.
What's the Q strips vs the F strips I'm reading about more often?
Thanks bud
nfhiggs
Well-Known Member
3500K is not far behind at 198. And like I said - you gain efficiency by running them softer. 3000k is 187 at test. Use the simulator to run them at whatever configuration you can think of.
It is interesting still.https://www.digikey.com/catalog/en/partgroup/f-series-gen3/67179
Here's a link to the strips, you can Google them specifically for grows and other relevant info
Because a single ended super hps doing the math atm, puts out 90000 lumens. Works out to 150 lumens per watt.
Fairly comparable really, and if de fixtures have 30% more output on average than single ended bulbs, it has to be really close to the LED watt/watt.
I found it really interesting in the video about the McCree curve as well. How a PAR meter doesnt measure the type of PAR. Only how much there is.
Its really exciting the LED's are headed in the right direction.
Just wish they'd improve on the price.....
Also the quality is few, and far between.
Thanks for the link man.
Edit: excuse me, DE is 10% more efficient than single bulbs.
My mistake.