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Led Vs. Hps - 70w Challenge
- Thread starter Medved
- Start date
S
stonedeconomist
instead of trying to make a "fair" test, wouldn't it be better to try and set up a test were the MH/HPS and LED grows were set up so as each would perform at their optimums and then decide which is the winner based on something like grams of bud produced divided by total kilowatts used for each grow. or quality of buds produced from identical clones. or total days needed for each grow from the time the rooted cuttings are placed in the grow cabs to start vegging to the time they are chopped. the reason we are all interested in growing with LEDs is because they are supposed to use less electricity to produce a given amount/quality of growing light correct? less electricity means less waste heat. less waste heat means smaller, quieter exhaust fans. fewer amps needed to run the grow, etc. so shouldn't success or failure of any MH/HPS vs LED grow-offs be measured based on how much good bud you get for how much electricity? if you are comparing apples and oranges you can't decide which is the "better" fruit based on taste, appearance etc, because those are just different for each fruit. but you can decide which is better based on which crop yields a higher profit. if this doesn't make any sense please ignore it, i'm pretty baked right now.
exactly.
That is pretty much what I am doing. Even so, I have seen one or two things that I could have done better. At 16 days veg now, the LED side is 15" and the HID side is 14". Not a big difference, but noticable. I will be putting them into flower when one reaches 18". If one hasn't made it to 18" when the other has, well that's (part of) what we want to know. All conditions as much the same as possible for both plants; lights on and off at the same time; the main difference is how much electricity each light uses during that time on. I see now that it might have been better if the plants had separate reservoirs since the LED side is surely using less nute solution and, therefore, getting fewer nutes.
As pleased as I am with the results I am getting, I still want to stress that having only one plant on each side greatly limits the strength of the conclusions you can draw from the test. There can be any number of things that could account for differences in results. Repeating the test several times and achieving the same results each time would strengthen the reliability. But for myself, drawing roughly 20% of the power and actually out-performing the HID side.......well.....that's phenominal, far above what I had anticipated. But this is also just 1 light directly over 1 plant on each side. I will be curious to see how it translates to growing several plants under 1 light(array).
That is pretty much what I am doing. Even so, I have seen one or two things that I could have done better. At 16 days veg now, the LED side is 15" and the HID side is 14". Not a big difference, but noticable. I will be putting them into flower when one reaches 18". If one hasn't made it to 18" when the other has, well that's (part of) what we want to know. All conditions as much the same as possible for both plants; lights on and off at the same time; the main difference is how much electricity each light uses during that time on. I see now that it might have been better if the plants had separate reservoirs since the LED side is surely using less nute solution and, therefore, getting fewer nutes.
As pleased as I am with the results I am getting, I still want to stress that having only one plant on each side greatly limits the strength of the conclusions you can draw from the test. There can be any number of things that could account for differences in results. Repeating the test several times and achieving the same results each time would strengthen the reliability. But for myself, drawing roughly 20% of the power and actually out-performing the HID side.......well.....that's phenominal, far above what I had anticipated. But this is also just 1 light directly over 1 plant on each side. I will be curious to see how it translates to growing several plants under 1 light(array).
The reason I suggested no nutes to keep it fair is because of "who" you want to control the experiment. If you using no nutes, then the plant and the soil are the only thing controlling the minerals etc.. If you are guessing along the way, then you could give the LED/HPS a better chance and never know a proper result. It would be very easy to under feed the loser. Also, plants would show which deficiencies are prevalent to each method. What's the point of an experiment w/o a control? All you would have to do is not feed a few plants.
Just a thought.
Medved thanks again for doing this.
Just a thought.
Medved thanks again for doing this.
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Nice work guys!!
Nice work guys!!
MedVed and LED_experiments it is good to see people pushing the envelop. Looks like your on the right track.
Boerman hows the Hidhut light working out for you?
Anyone.....How does the root and stem structure look when you compare plants from the different light sources? May be hard to tell right now but some of you have done more than one grow with this new technology.
The only test that holds any importance is the one at the end when you are using your scales.
Nice work guys!!
MedVed and LED_experiments it is good to see people pushing the envelop. Looks like your on the right track.
Boerman hows the Hidhut light working out for you?
Anyone.....How does the root and stem structure look when you compare plants from the different light sources? May be hard to tell right now but some of you have done more than one grow with this new technology.
The only test that holds any importance is the one at the end when you are using your scales.
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WTF - It is going great. Both sides look very good and healthy. I will be going to 12/12 today since the LED side has reached 18". The HID side is just 16". Going into flower will present a small problem for my videotape since I have been just turning off the grow lights and turning on the ceiling light to tape. Then I just turn them back on. But in flower, I will have to be more careful. Don't want any hermies.
I don't see any significant differences in root/stem structure. The LED side seems to have a bit more root mass. But, then again, you would expect that since the upper part of the plant is bigger.
B
I don't see any significant differences in root/stem structure. The LED side seems to have a bit more root mass. But, then again, you would expect that since the upper part of the plant is bigger.
B
Medved
Member
helou everybody, here is the 48 days of flowering, and today I choped 2 more DCSkunk from the led box. Only 3 AK-47 are now in the led box. Here are some pics
HPS room
DCSkunk drying, left one, almost a week.
3 AK-47 under leds
And a AK-47 HPS bud
Now i'm going on my vacations for another 6 days, hope that everything will be alive when I caime home
Have a nice evening everyobody
HPS room
DCSkunk drying, left one, almost a week.
3 AK-47 under leds
And a AK-47 HPS bud
Now i'm going on my vacations for another 6 days, hope that everything will be alive when I caime home
Have a nice evening everyobody
G
Guest
I have to say looking at that DC Skunk drying that the LED side of things needs a lot more work as those buds are microscopic. I realise you had some problems with this grow and for the nest attempt, I would suggest going just LED and concentrating on getting the best possible result from your LED light setup. I hope there is a lot more potential to be eased out of your LED setup as from the results of this first attempt, it just isn't working too well.
LED_experiments
Member
believe me, there is a lot more potential. when he finds out how to use the setup properly, the results will be much better. there are some things that hps growers have to change when they start using hps. this grow was not as good as we hoped, but i think medved got some experiences. keep on growingBritish_Hempire said:
Levitikuz
Member
Why doesnt he try using his nice LED set up along side a HID lamp?...its still saves power because ur still only at 140 watts and the LEDS can really focus on individual parts of the plant and also putting out almost the exact light spectrum while the HID covers the grow in light....best of both worlds?...would you ever consider that?
later
later
DCSkunk drying <-- lol pathetic, m8 why even both drying that n shit cos its like 2 weeks in flower, no strength or high
Medved
Member
Back from wacations, and a little update, now it's 58 days of flowering and inside I have only 6 ladies, 3 in the LED room and 3 in the HPS room. The last 3 DCSkunk from HPS room was chopped today and looking much better than 3 DCSkunk from LED box that were sick a lot.
A friend lend me a wage with 0,1g accuracy. And the total weight of 3 DCSkunk from LED room, was only 4,0 g. But I look positive at this, next time must be better can't be worse For AK-47 I will wait for a few days maybe a week.
Here are some pics from the current boxes.
led bud
led room with 3 AK-47 inside
here is a HPS AK-47, the buds are pretty heavy so they are going back to net
and a HPS room
Have a nice day
A friend lend me a wage with 0,1g accuracy. And the total weight of 3 DCSkunk from LED room, was only 4,0 g. But I look positive at this, next time must be better
can't be worse For AK-47 I will wait for a few days maybe a week. Here are some pics from the current boxes.
led bud
led room with 3 AK-47 inside
here is a HPS AK-47, the buds are pretty heavy so they are going back to net
and a HPS room
Have a nice day
Medved said:A friend lend me a wage with 0,1g accuracy. And the total weight of 3 DCSkunk from LED room, was only 4,0 g. But I look positive at this, next time must be better
Out of curiosity, what was the total weight of the 3 DCSkunks from the HID room for comparison?
Mrskunkster
Member
Hps buds look great!
Hps buds look great!
Hps work awesome and give weight and size to the buds, them LEDS look like they were barely producing anything. Thought you would at least get a Half o or something, 4gs ain't worth the effort. But thanx for showing us, are them Leds buds tasty?
Hps buds look great!
Hps work awesome and give weight and size to the buds, them LEDS look like they were barely producing anything. Thought you would at least get a Half o or something, 4gs ain't worth the effort. But thanx for showing us, are them Leds buds tasty?
So, Medved, in you opinion, how do you think the LEDs do in comparison to the HPS? What's the real potential of LEDs (like do you think you could expect more product?)?
I'm pretty excited about LEDs and will probably grow pretty soon with them. I just want to hear some more opinions from LED experienced growers.
I'm pretty excited about LEDs and will probably grow pretty soon with them. I just want to hear some more opinions from LED experienced growers.
G
Guest
yeshwa said:
how do they do in comparison? did you read the thread? hps owned led at 70w, some argue the technique changes under different lighting, so maybe led potential hasnt been fully reached.
