Led Vs. Hps - 70w Challenge

[Medved]

helou everybody, time for some update, I manage to take some nice pics. Hope you will like them

The girls are now in 12 days of flowering. here are some pics,


















All 4 pics are from led room, when I need to take some pics in hPS room, my digital camera said, please replace the batteries Maybe later I will go to take pics from HPS room too.


I'm still watering the girls with the nuts for veg, and I think they like it

Have a nice day everybody

 

[XyZ]

looks greats mate ...leds are real funny lights... the plants may think they have a party all the time

 

[Medved]

not any more, only for 12 hours a day need to install some stroboscobic light inside, for the real party

 

[Medved]

As I promise, here are some more pics of HPS room and also a few of LED room.

my hand inside HPS girls





girls under LEDs and the halogens turned ON





girls under leds that are turnet off and only hallogens turned on for only 15 min.




HPS room, HPS lamp turned OFF







and a HPS "bud"




Hope you enjoy in reading this thread, bye

 

[lc00p4]

what are you using the halogen lights for? those led ladies are lookin nice, but not as nice as hps ladies. once you get those leds to blink, you should make another video so i can see what that looks like. keep on keepin on!

 

[Guest]

Frankly, I am fascinated by LEDs for growing as I see they will be the future, especially for small grows. I was hoping some of you knowledgeable fellows in this thread could help me out with my thoughts:

Photosynthesis is most pronounced in the red (600-680nm) and blue (380-480nm) wavelengths of light. High Intensity Discharge (HID) lighting is designed to cover these specific wavelengths, known as the PAR spectrum (photosynthetically active radiation).

I am using a 250w HPS, as a rough figure, lets say it produces 25000 lumens. Now, of course, only a portion of that light output is of the wavelengths the plant requires for photosynthesis, again as a rough figure, lets say 50%.

So, if only 50% of the lumen output is of the PAR spectrum my 250w HPS is producing 12500 useable lumens.

So does this mean that an LED array producing 12500 lumens, all of them within the PAR specturm will have equal performance to my 250w HPS?

How many LEDs would be required to produce 12500 lumens of the correct wavelength? Roughly how much would a LED setup like this cost?

Does anyone know the actual percentage of light from a HPS that is of the correct spectrum for photosynthesis?

 

[Sportster]

Very nice work Medved...I just got turned on to this thread as I too am doing threads at other sites about this same growing concept....I love seeing others steppin' up to the plate for new adventures and expermints!!!

I'll be watchin' the outcome of this fer sure my friend!!!!

 

[Guest]

Hiya sportster, good to see you here, nice to get all the LED experts together in one place.

 

[Medved]

Helou everybody, some update from here. Girls are now in 17 days of flowering, and they look fine

First of all some pics under LEDs.

a pic of whole LED room



a led bud


girls under 70W HPS




a HPS bud





and both places together.





stay tuned, and happy smoking to all

 

[XyZ]

the last pix looks very cool!
good job so far, keep it on dude

 

[Medved]

Helou everybody, had some time, so I combine 1 video more.

Here you can see it.

girls at 17 days of flowering

LED vs. HPS 17 days flowering


Hope you will like it, by and have a wonderful day

 

[Guest]

Looking good medved, thanks for taking the time to do such a well documented comparison.

 

[Paddi]

Cool video Medved

Paddi

 

[Browser]

Hello Medved,

Just passing by. I wanted to congratulate you on such a great thread, and for all the resources you're investing in this experiment, which you share with us. For that much

I'm sure I'm not alone when I say that "The Community" is thankful

Take care and keep up the good work I'll be following

 

[Guest]

excellent! that video is great

 

[Medved]

helou,

thanks for stopping here everybody. I hope you will like my thread. Girls are in 18 days of flowering, and here are some photos of night cycle

first some HPS








and some LEDs









Have a nice day

 

[KB420]

Lookin really good man, keep up the great grow

 

[trapik]

Congrats on the experiment, mate!
Very interesting.
I second esbe... I hope LEDs will be the lights of tomorrow.

thanks for sharin

 

[Medved]

KB420 and trapik thanks for stoping by, hope you will like that thread. Some update, girls are now in 20 days of flowering and buds from DCSkunk look biggers than from ak-47 some pics in continioue.

led bud



girls in HPS room are up to 70 cm



something jummmy for everybody



in led room, the girls are only about 50 cm they could be about 60 cm, but i trained them under the net then



some HPS trichonoms from DCSkunk



and at last beautiful pic of led bud of course DCSkunk



Thanks to everybody who is watching this thread

have a nice sunny day

 

[kurlyq2g]

Wonderful work, I was hoping someone would do this side by side soon.

Keep it up.