Led Vs. Hps - 70w Challenge

[Medved]

Mrskunkster the taste of LED-DCSkunk is wierd, not very good think that AK-47 will be much better.

yeshwa . I think that leds could not compare by HPS yet. But we will see in round 2

i think here is the last update with pictures. I already make a new round, but don't have too much time now so the pics will come some other day.

Today I choped the rest of girls. 6 girls, 3 under LEDs and 3 under HPS. It was 64 days of flowering I think

here are the pics

trimmed LED AK-47




trimmed HPS AK-47




and 9 girls drying



here I will only post the weight. Till next round, have a nice day

 

[Mrskunkster]

Still its only a 70 watt hps! very good use

Still its only a 70 watt hps! very good use

Thats good use of space too, the hps give a more direct light to the plants, I've got a 150 and it fills the plants right in. Still leds will be the future cause its good lighting for the size. Can't wait to see the next grow,~ Nice harvest too ~Peace

 

[Medved]

last post with pics in here.

here is a mistake in the picture, the total weight of that AK-47 is 15 g not only 10,5.


well the results were very bad total weight of both boxes only 35 grams. So here we go

first the LED box, under 3 DCSkunk I got 4 g.
under 3 AK-47 I got 5 g.
Total weight under LED's was 9 g That's about 0,13 g per W. Very bad.

It's too early to get any conclusions. Because the HPS box was poor also.
in the HPS box there was: under 3 DCSkunk I got 10,5g
under 3 AK-47 I got 15 g
Total weight under HPS was 25,5g. That's about 0,36g/W. That's better but I think that I can come up to 0,7 under 70W HPS. We will see more in round #2

Thanks for support and let's continoue debate in the other thread

Have a nice evening everybody in happy growing to all of you

 

[Guest]

round 2 ought to be a great show, good luck mate

 

[J-Roc]

dude. medved man. what a ride. major k+ for you when i can
thanks for all the great pics

 

[CMatzner]

I'm not sure how medved has such low yield. I have a theory... but I'll leave that for later, theory without evidence is folly

I ran LED+HPS in the same box (70W+70W). It was a really shitty grow because I was inexperienced and didn't do things properly and I had fungus gnats everywhere. I can tell you though that I had over 1 ounce (I smoked most of it before I got to measuring it). It's somewhere between 1 and 3 ounces though. My plants looked nothing like yours. I had pieces as large as my fist.

 

[Mr.Kade]

Sorry things didnt go that wel MedVed, but very informative thread though, i especialy like those videos. good show.

 

[Ace2p]

hey medved,
props on the experiment...im also about to attempt an led grow
I'm glad you were able to do a side by side comparison. I am very optimistic about using LEDs to grow, the whole time I was on your thread I was rooting for the LEDs... well, one thing I am gonna do is overdrive my leds using a pulse generator, you should get many many times more lumen output this way. I would suggest keep your setup, and I'll let u know how the overdriven LEDs work, and I'll help you make a LED driver, so you can do the experiment again and have the LEDs win! Very nice thread, Peace everyone...

 

[esbe]

such an interesting project, hope you will try it again despite your problems!

 

[blackone]

He already is at it again http://www.icmag.com/ic/showthread.php?t=67108

 

[HOODOOBLUESMAN]

thank you

thank you

to mr medved--
thank you for this thread...
i have learned from it...

also you answered a question of mine at "you tube"...
then you directed me here...
thank you -thank you

 

[iSHACKABUKU]

Great thread!!

 

[Mr.Bongowsky]

Man, that's a well done job, K+'s goin' to you
Good luck with second time

 

[Grafer]

K+++++

 

[Strain]

That does it im keepin my hps 4ever

 

[phase]

I always wonder when I see LED grow experiments, why nobody is using high power LEDs such as those produced by Philips under Lumileds Luxeon (I, III, K2, Rebel), Cree, Seoul (Acriche) or Osram? Most of them start at about 1W - 3W of power, but there are also more powerful models of 5W and all the way up to 17W for the Osram Ostar (1120 lm to give you an idea, color temp is around 6500K for this one).

They may not come in as many different wavelengths as the smaller regular LEDs we have all grown accustomed to, but they are certainly more intense in output and leading some major efficiency improvements. Especially when you're going to flower under them, it would seem to me that intensity is a very important factor. They can also be easily fitted with collimating optics to further aim the light straight down.

Didn't think about it? Or would this just have become a tad too expensive for this experiment? I always like to read this kind of reports, keep the good stuff coming guys!

 

[LED_experiments]

i'm just prepairing to start my next project with high power leds. not sure what i'll use, but most probably cree Xlamp XR or luxeon III or k2 (3W, with 5W leds you can have problems with heat). there are not all the needed wl avaiable, but i'll give them a try.
expensive? not really, for the same power consumption costs are more than 50% lower comparing to 5mm leds (used in this experiment).

 

[phase]

I've read many good things about the Cree diodes, though I haven't really tried them yet due to lack of a solder reflow oven. In the event that you would use Luxeons, might I suggest the K2 or the Rebel (these are the more recent models). Very practical in use when they are mounted on a Star PCB (with the Rebels you can also get 3 on 1 star). Sure sounds interesting, good luck and I'll be sure to keep an eye open for the next run!

 

[LED_experiments]

k2 are good in blue and white, but in red, luxeon III seems better to me (more lumens, higher current). ofcourse reds are more sensitive about heat and that stuff.
i'd like to use cree, but i have to find a good european source of them (most of them sell only white).
soldering rebel manually is a PITA, because they are just 3×4mm (whole body). i saw rebel star but there are only rgb and white avaiable (at the moment). if i find blue and red rebel star (or 3 on 1 star), i'll use rebels. othervise i think i'll use luxeon k2 blue and white in combination with luxeon III red.

 

[phase]

As for the triple Rebel-stars, take a look over at leds.de where they come in 455nm (Royal Blue), 470 nm (Blue), 627 nm (Red) and there is also a white version available. Unfortunately they only offer the blue and white XR-E emitters on the Cree side of things.