THE FUTURE IN LEDS's!!!
- Thread starter sportsballer06
- Start date
lampshade
Well-Known Member
Everyone just needs to go out and get the HIGH TIMES growers/beg guide 2009. Its avaliable all year long. In the end it talks about lighting and what cannabis needs. It then goes on to do a side by side comparison. I will go find the mag if peep want details. Anyhow the 99w LEDS outperformed a 400w metal halide by 10%. Then it lost to the 400w hps by less than 15%. It goes on to talk about how they designers had to use the wrong wavelength of blue and red because of the costs. The wavelength they used was twice as cheap. They said that as prices go down, it shouldnt be unexpected to so LED outperform a HPS. Again per watt the LEDS already bet a HPS ANYDAY. Its just cost. Go back in time 30-40 years, and ask how much it would have been to get a HPS.If it's more powerful, please, please post a grow journal and SHOW us.We want to know.Hell, we're all growers, we're happy to use new technology if it really is beneficial to our grow.If this light is better than an equivalent HID, PLEASE,it needs to be documented.
sportsballer06
Active Member
"Anyhow the 99w LEDS outperformed a 400w metal halide by 10%"
AND THE MH HAD 300 WATTS ON THE DAMN THING!!!!!!!
sportsballer06
Active Member
If it's more powerful, please, please post a grow journal and SHOW us.We want to know.Hell, we're all growers, we're happy to use new technology if it really is beneficial to our grow.If this light is better than an equivalent HID, PLEASE,it needs to be documented.
Im workin on it man. Ill get a journal up sometime soon.
TeaTreeOil
Well-Known Member
That really doesn't* make much sense. HPS are much narrower in spectrum than MH.... You sure that isn't backwards?
I guess it's possible if you take a really shitty MH compared to an top-end 'grow light' HPS.
lampshade
Well-Known Member
Ok i just re-read the artical. Soooo high times says that the LEDs outperformed the MH by 12%. And that in underperformed the HPS by 5%. Also the LEDS took a week longer to finish and experienced stretching. This is b/c they were not using the right spectrum of blue leds, due to cost. People are still working on the technology to make this product cheaper, but there has to be a market for it to get started. So in my opinion, if you want an experiment, then go for it. To alot of this growing is a hobby, not about money.
TeaTreeOil
Well-Known Member
Did HT report what brand of bulbs and ballasts?
1982grower
Well-Known Member
This thread needs to be straightened out. My aquarium fixture will blow away any metal halide and is just barely more efficient than a sun agro system. Sun agros most efficient hps bulbs are 153 lumens per watt. My fixture is 163 per watt. No offence to the poster of this thread but I could look you in the eye and tell you that you have never grown before. When it comes to light all that matters is lumens per watt, kelvin rating and then the heat issue. Like i said before my fixture is Cree and Luxion leds. Look them up if you think I'm making this up. These are the only leds available that can beat a hps system. Any other leds like those blue and red 9 watt bulbs are max 60 lumens /watt. They are often called superbright and they are cheaply made in china. Check out Cree or luxion if you want to do it right. I would like to here what others think of my opinion if no one minds.
TeaTreeOil
Well-Known Member
Lumens don't mean shit(alone).
Lumen is a measure of intensity to human eye balls. Which is a ~560nm peak bell curve.
Plants spike in 440nm and 660nm give or take a bit. Nearly opposite, in the visible light spectrum.
1982grower
Well-Known Member
Of course high times is going to say there great they want you to buy them so these companies will keep on advertising. how many dollars do you think high times gets for every light sold out of the mag. They are a sellout mag anyways. There lighting advice is about as real as the white widow weed they sell thats "legal". LEDS are the future but just not today.
1982grower
Well-Known Member
I must have said it weird sorry. Lumens do measure efficiency perfectly ASSUMING that you have the best colour spectrum for the plants to absorb. Didn't mean for it to sound like a 100000 lumen brown light would work the same. Assuming the spectrum is ideal and temp. Agree at least a bit more.
lampshade
Well-Known Member
Nah they didnt give shit for info. They also compared it to a 600w HPS. Of course, the poor thing got smoked by the 600watter. They did say that they were all in the same ebb and flow, and clones from the same mother. There may have been no veg, its hard to call. Ill write them, and see if i get some info. Lamp.
1982grower
Well-Known Member
I had colour accounted for in my first response. The 420 to 460 range can be turned on on my fixture. The fixture can dim simulate cloud cover and change colours in the white to blue range. At 420 i get a reading on my lux meter of still respectable 51000 lumens. the fixture is 400 1 watt leds. 163 lumens peak at 15000 k. I am not disagreeing with you that less watts at 420 could grow the same or better plant just that Cree and Luxion are the only true led manufacturers. And some of there partner companies.
TeaTreeOil
Well-Known Member
Wrong.
Lumen is defined as light most intense at ~560 nm(GREENISH-YELLOWISH).
It doesn't [significantly] extend to the points on the spectrum where plants thrive: 440 nm and 660 nm. 400 to 700 nm is defined as Photosynthetic Active Radiation (PAR). Professional growers know (or ought to) about this.
A bulb could have a HORRIBLE lumen rating and HORRIBLE CRI(color rendering index) and still grow plants 'effortlessly'. This is what plant-LEDs do.. with their magenta-colored light.
For example, low pressure sodium can emit 200 lumens/watt(most efficient bulb known). It does this by emitting over 90% ~589 nm light(monochromatic). High pressure sodium broadens this spectrum significantly, but also significantly lowers the lumens/watt(up to 140 lm/W).
HPS is still greenish-yellow light predominantly. Which seems really bright to humans, but isn't to plants. Most light is reflected off or transmitted through the leaf.
Learn more here: https://www.rollitup.org/2081469-post16.html
lampshade
Well-Known Member
HPS is more red yellow, enhanced HPS has more green and blue and it looks more pink.
TeaTreeOil
Well-Known Member
Yes, HPS spreads from yellow to orange to red.
It also spreads from green to cyan to blue, but much less compared to red.
It is still predominantly(HUGE SPIKES) green-yellow ~560 nm.
lampshade
Well-Known Member
I dont wanna argue but, Definitely alot of yellow, but didnt know there was much green.
This is an enhanced blue and green bulb:http://www.homeharvest.com/hpsodiumbulbs.htm
and it still doesnt have shit for green or blue compared to red.
TeaTreeOil
Well-Known Member
See the huge spike at 570-580nm(where it hits 100%)? That's yellow-green. Below (or at) 560 is green-yellow.
A Hortilux, though. Nice bulbs, for HID, anyway.
1982grower
Well-Known Member
I am not disagreeing with that. Lumens are important only when everything is set up correctly. I do agree that light with a higher par rating will be absorbed more efficiently by the plant. I am not specific enough. I sound like a liar. Basically i mean that if you have the perfect lighting spectrum from 2 different lighting types, then taking a lumen reading and finding out which puts out more lumens per watt. That light is the best for the plant. The measurement is accurate for these purposes as long as you are comparing the same par kelvin etc. Besides i think your supposed to be watching my LR2 grow. lol