killer flowering light veggii....just a litlle bigger than what we want to add to our room.....i think we may just add some 660s
WT

__________________
Your style will eventually match your grow area and the amount of time and money you like to put into initial setup vs. long term maintenance.-stinkyattic
"Boy, the next words outta your mouth better be some brilliant Mark Twain shit...cause it is definitely getting chiseled on your tombstone"-Otis Driftwood
LED growing- An instructional grow log
Episode 3...Revenge of the LED

Ya I thought bout mixing but I think the solid red will
sell better as ppl will beable to just add it to their flo's
or their MH at flower time or just run it alone
If they want a full spectrum light we already have the procyon
I like those guys over there @hgl they worked hard for their business and they deserve it
I want to make different light's than theirs,but on par as far as quality.
I have a different fixture design in mind "old school"
some might say.
Its a lot of work and $$$ getting it altogether
but if I just keep on it everyday soon it will be done!

keep us posted veggii!
WT

__________________
Your style will eventually match your grow area and the amount of time and money you like to put into initial setup vs. long term maintenance.-stinkyattic
"Boy, the next words outta your mouth better be some brilliant Mark Twain shit...cause it is definitely getting chiseled on your tombstone"-Otis Driftwood
LED growing- An instructional grow log
Episode 3...Revenge of the LED

sounds interesting...would love to hear more

__________________
Recap on LED theory and LED shopping list
http://boards.cannabis.com/indoor-li...-light-10.html

One of my electronic assembly customers, a Phd electrical engineer who once did robotics for JPL, and I are working on an
LED grow lamp that is flexible and updatable, as well as ajustable in-situ. We will be doing growing trials within 2 months with medical
growers...if any of you would like to offer your input, it would be
most warmly accepted....DarioT.

physics i could use some help on the circuit got msn??

So off topic for just a bit
I have been looking into the Luxim's and the technology they use
and they use a radio wave to ignite it which is why it lasts so long
fluorescents only burn out cause the igniter's do. you know the black stuff on the ends of the bulbs,, so i stumble onto a article this guy wrote in and he was saying his friend is a electrical engineer at a radio station and he has been bringing in old burnt-out fluorescents and igniting them!! with the radio waves !!
so don't throw out your Flo's when they go out save them, the technology is coming !!
they will basically run for a lifetime if I am understanding correctly
with using the radio wave to ignite them sweet huh!!

well honestly I've been thinking about what the "perfect" spectrum should be. and i have a couple of ideas. first, by best do we mean efficiency? or actual absorption? on the high times chart there shows to be pretty much 100% absorption at 425nm and 660nm. thinking about this i started thinking...if we provide only 425 and 660 then most of our light we supply in those two wavelengths, and if the charts are correct, will be absorbed almost 100% , meaning almost almost all of all the light energy we put out will be absorbed by the plants, making the LEDs about 100% PAR (right?). isnt that what we want??? do we really need to hit these other peaks (440,470,642,etc.) or can we just supply these two wavelengths, 425 and 660nm? having more LEDs and colors will reduce efficiency but also increase absorption by the individual pigments. as of now i don't think i could answer these questions. but with some testing i think i can. i will perform a test with 425 and 660 on one or two plants and on another ill try all the peaks, and form there we can compare the results, and hopefully that will tell us if supplying just 425nm and 660nm is just as good (and even more efficient) than providing all the peak wavelengths. as of now 425nm high-power LEDs are not commercially available, so this is one limiting factor. also 660nm high-power LEDs are a new development and still have some improvement. also blue light has more energy than red light, so providing more blue light in the array would mean more PAR or umol/s/m^2. but we still want to keep the light ratio of red to blue right at about 2:1 B:R for veg and 7:2 R:B (something like this) for flowering. I'm starting to think about this whole "peak" wavelength we've been talking about for a while. do the peaks even matter? at 470nm there is about 81% absorption for all pigments and about 77% for chlorophyll b. im just tossing ideas around here.

oh fuck wrong thread...sorry SnS!!!

__________________
Recap on LED theory and LED shopping list
http://boards.cannabis.com/indoor-li...-light-10.html

hey physics, veggi, sns, and all you other pioneers
ive just posted in another thread but think its more relevant here. i had compiled a shopping list similar to physics, slightly different wavelengths, and only used the led engin for 660. and have a company prepared to mount on pcb and have another company to provide cheap mountable driver solutions. so my thought was to simply come up with a circuit get the board made up with heat sink attached and simply post link to the manufacturer where you can order the pcb and have it made so as to be easily mountable on a diy case with cooling fans. then we could post a build your own led grow lamp with the relevant link.
just think doing it this way takes out as many middle men as possible keeping costs down in support of the cause we are all here to support
peace out

i actually agree completely with ya physics. look what we have with just 2 wavelengths. Although they arent the 100% wavelengths...we still have it pretty damn dank. maybe same ratio we have now, just 660's in place of the 635s we have in there...or just adding some 660s to ours. would love for you to come out, you can SEE the plants reactions to the ratio we have now, would really help your ideas n shit... i dunno though, being told i am an asshole not into advancement lately, you you may be wasting your time with us...lol you still coming next weekend? bang our heads together without having to type...lol


whiskeytango

__________________
Your style will eventually match your grow area and the amount of time and money you like to put into initial setup vs. long term maintenance.-stinkyattic
"Boy, the next words outta your mouth better be some brilliant Mark Twain shit...cause it is definitely getting chiseled on your tombstone"-Otis Driftwood
LED growing- An instructional grow log
Episode 3...Revenge of the LED

hreat idea sweetgreen! between you physics, and ourselves, we can have enough experimentation done to have a proven D.I.Y on here, no reason people shouldn't be doing it themselves...interesting idea huh guys? COMPLETELY self made/contained grow ops will be here soon!!! with solar maybe? not pulling much power at all....see you guys in the future!!


whiskeytango

__________________
Your style will eventually match your grow area and the amount of time and money you like to put into initial setup vs. long term maintenance.-stinkyattic
"Boy, the next words outta your mouth better be some brilliant Mark Twain shit...cause it is definitely getting chiseled on your tombstone"-Otis Driftwood
LED growing- An instructional grow log
Episode 3...Revenge of the LED

sounds awesome sweetgreenbuds!!! im designing my own PCB with expresspcb. they will make boards pretty cheap too. i think for the driver ill use some of these http://www.fairchildsemi.com/ds/FQ/FQP50N06L.pdf MOSFETs to regulate the voltage. each MOSFET can handle up to 52A at 60V (holy shit!!) and it can dissipate a maximum of 121 W of power. if we keep the supply voltage of the MOSFET and the forward voltage of the LEDs close, then there should be little energy waste with heat (which is how the MOSFET keeps the voltage regulated). i was thinking with 1 MOSFET we can have 3 LEDs in a series, and have maybe 10 parallel strings of LEDs in that same MOSFET circuit. since the MOSFET can handle alot of amps, 10 parallel strings of 3 LEDs in a series would be 30 LEDs on one MOSFET (there are 80 or so LEDs total im using). thats about 12V and 10A for 30 LEDs to be run with one MOSFET. if we can keep the supply voltage within .5V of the forward voltage of the LEDs, then at 10A (for 30 LEDs) there will only be 5W of heat being produced by the MOSFET to keep the voltage and current constant (only 5W lost out of 120W of power supplied, thats 96% efficiency). of course these value will differ a little for each LED but will be taken into account.

__________________
Recap on LED theory and LED shopping list
http://boards.cannabis.com/indoor-li...-light-10.html

Go Phys Go Phys Go Phys let's take the specs and build. Ill be Bank...

hey physic
just a quickie question i mean.
i'm sure you've got the spec sheets for the rebel and the ledengin 660(if you cant answer off the top of your head). i've deciphered the data sheets as best i can and just have 1 question i need clarified. my plan is to drive the rebels at 700 ma with 3v fv. are these figure acceptable or is the drive current in a set range and pre-determined by the forward voltage and varies proportionally. sorry if this seems a novice ? but this isn't my field but i'm comming round fairly fast

peace

The current through an LED is established by the voltage drop across it. But here is the tricky part.. the relationship is not a predictable constant and it is not a linear relationship. The voltage drop required to produce the desired current will vary from LED to LED even in the same bin. It will also change with operating temperature and age of the LED.

I have been designing,hand building and using high power LEDs to grow for almost a year. When I build an array, I burn it in for two weeks powering it by a bench constant current power supply. I then measure each series string and set the current limiting resistor (or LM-type regulator) to the exact value needed for that string.

Another tip: If you are trying to achieve energy efficiency you should be driving them at 350 ma instead of 700 ma. If you are trying to get the most light output for your money, then go the 700 ma. The high end commericial lights all drive at 700 ma in order to cut material costs. If you double up on LEDS used, drive at 350 ma, you will pick up about 20% better energy conversion efficiency. Plus you will have twice as many points of light.

ROFL! ....too...funny... . .
Ok where'd I go ..oh ya 660nm, I definatly think the next logical
test would be of 660nm and 425nm. considering that 660nm is approx5$ea.. a bulb more than 635nm red.so we need to know!
[I can only say stealth what do those baby girls look like,, is it worth the extra 5$ a bulb for 660nm as compared too 635nm]
I think it's Yes, but we need a test for concrete proof.. as the lack of wavelenght's (stress) may cause added resin production so infact the 635nm may be better...and we know it's cheapr to buy
know where was I.........brb
Hmmm ...a 60watt all 660nm 6x6x2....mmmm!

Quick question. i want to buy the procyron 100. but just one for now. i want to stick that in with these T5's T5's
which are 2,000 lumens per bulb. im going to get Two 2 Foot 2 Lamp High Output T5. and stick them on the sides of my flowering chamber. will this work well with the procyron?

Also how good is the procyron at Vegging?

ZRock, I ordered up 20 of the Ledengin 660s to integrate into my setup as soon as I can find the time. I will only be using them on a portion of the crop so I can get an idea of the difference if any. I will be removing an equal wattage of 630s to get a fair comparison.

If you are trying to pick up some 660 energy,you might also try using the K2s instead of Crees for your 630s. They have a much wider bandwidth and only have about a 60%-70% drop from peak at 660. Looking at the SPD charts, the Crees ain't got nothin at 660. Also you might try using warm whites since most of them put out ok power at 660. Probably the best one at this time is the SSC P4, but the K2s aren't bad.

Ok so here is what i got so far. Sorry for the post above im still confused on if this will work well or if im just wasting money.

Lighting:
One 4 foot, 4 lamp High output T5.(20,000 Lumens)
4 6500K Fluorescent Bulbs.
4 3000K Fluorescent Bulbs. - $147.90

Two 2 Foot, 2 Lamp PL-55 Tek Lamp.(20,000 Lumens)
4 3000K PL-55 Fluorescent Bulbs.
(comes with 2 6400K Bulbs per Lamp for total of 4)-$181.75

One Procyon 100W LED Grow Light.( ? Lumens)
Procyon-100 100W LED Grow Light - HomeGrownLights.com - $599.99

I want to use just the T5's for vegging.
And then switch the bulbs for flowering with the Procyon.

For Flowering:
Have the 4 foot T5 in the back standing upright.
Have the Two 2 foot T5's on the sides standing vertical.
Have the Procyon overhead.

For Vegging:
Have the 4 foot T5 overhead.
Have the two 2 foot T5's on the sides standing Vertical.

Yo trainwreck,

im sure that will work. but you might consider the procyon for veg. you can hang it almost vertical, so maybe on the side to experiment? 20 of our 23 plants did very well under them. lots of nice trunks to support the plant growth, and when checking the root balls on the removed males, we were impressed by the amount and length of the roots.

heres a link to our yeg. summary post
LED growing- An instructional grow log

db

__________________
Your style will eventually match your grow area and the amount of time and money you like to put into initial setup vs. long term maintenance.-stinkyattic
"Boy, the next words outta your mouth better be some brilliant Mark Twain shit...cause it is definitely getting chiseled on your tombstone"-Otis Driftwood
LED growing- An instructional grow log
Episode 3...Revenge of the LED

thanks for the reply.

how many lumen's does one Procyon emit?
i need to find out how much room i can use with this setup

also im very interested in the 660nm and 425nm LEDS once they become available does anyone know when they will around?
I would love to add them to this setup some how.

and i have heard that you can induce your plants to sleep with an hour of far-red 730nm before lights out? is this true, and are they available yet. that would be a great investment. i would just make some flood lights with the far red in them for flowering.

thanks again-