LED grow lights... input please.

[FakeBoobsRule]

Sean
You are not posting a hotlink to the site but 2 out of 3 posts have the website them. You are bordering into spamming for that website. If you continue to post the website in 66% of your posts, you will earn an infraction for spamming.

[turmoil]

I was looking around the web and found two 'instructables' regarding wiring up high powered LEDs thought you guys would be interested.

Circuits for high powered LEDS

Making a small High Powered LED grow light This guy does do some questionable things with his resistor though...

:jointsmile:

[physicsnole]

Those are a nice find:thumbsup: that would be nice if you were driving 10 or so LEDs but i think we have to use another power supply if using alot more, like 80 or 100. I was thinking a computer power suppy unit. look at the attachment.

[veggii]

if ignorance is bliss................

yes is'nt it .... BLISS

[veggii]

Nothing wrong with white in my opinion. Everyone keeps telling me I'm crazy, but white light seems to work pretty well for fluoros and HID. Just as with those, LED's have many different whites. Just make sure you use the right ones for the individual stages of growth.

Ya know opie i've been pondering this white light and it's purpose
everything has a purpose! then i thuoght about how everyone use's white for reflecting colors maybe that is white's job
reflecting the colors so they can travel farther and penatrate
farther into plants ,,just a thought

[sweetgreenbuds]

hey hey there my fellow led fans
so i've been following the whole led thing with avid intrest. (nearly pop a woodie thinkin of the possiblities.) so it has inspired me to start off another grow:thumbsup:
so after a bit of research the led's i ve decided to go with are the luxeon rebel and 1 type from ledengin. with such massive concern about lumens i figure that driving 200w should take care of that issue.
these leds have a meal mount and can be placed dirctly onto a heat sink. i have contacted a company who specialise in early design inovation. i think this is a brilliant innovation but probably wont raise a life changing amount of capital so instead what i am doing is once i have the finished the design i will post the full spec and cost. this will just be for all the leds on a pcb and drive hardware and with these i will post instructions for case construction and cooling fan and people can just buy the pcb and assemble (will also design a 110v but the manufacturer is uk based) the manufacturer is very helpful and i will post his contact details and im sure that adjustment to the array would be no problem for customising options. i'll leave with a list of the led's i've chosen. been lucky enough to find a supplier who will allow me to select from specific led bins to hit exact spectrums
ok so here's the list of luxeon rebel driven at 2.1w
w/l qty
440/445 5
460/465 8
465/470 8
480/485 6
495/500 7
545/550 5
613.5/620.5 5
631/645 24

and the ledengin driven at 3w
660 20

cheers for listen to my lil rant, just tryin to do my bit for the cause
peace out :jointsmile:

[veggii]

hey sweetgreenbud looks kool i stumble on this company
Heatron.com - Innovations in Heating and Lighting
they might beable todo the same kinda stuff
I have been seeing a lot of companies springing up with
custom led array production. It cause the Leds need proper
drive circuits ,and also need to be efficient so they have to be custom made per Led Light design.
I am thinking of building a 60 watt array with a advance sign pro
led driver as it will fit into my design. most drivers /mosfet's are
bigger and won't fit I have been getting pretty confused on
building my drive cicuit the more research i do the more confused I am getting maybe you can shine some light on it for me.
I want to string 12 5watt leds on the 60watt advance driver will this work?
do i need to add some more stuff?? will it even drive 12 on a string
a saw somewhere it was sayin 3 on a string??
maybe one of these? lm3407
http://www.national.com/cat/index.cgi?i=i//223
gotta run check ya l8trs

[veggii]

hmmm ..he ponders white light
realization of RGB-LED white lighting has many challenges
A requirement in white light applications is that lamps of the same type have the same color point.The color point may change with time or temperature,but lamps sharing the same history must all change in the same way.For example,it is unacceptable if all fluorescent lamps in a office are not the same color.it is also unacceptable if a LCD monitor displays a different white color point
at different points on the screen.
LED characteristics are far less reproducible than conventional lamps.
LED's vary in lumen output and wavelenght,and in their dependence
on temperature and time.Since mixing one or more red,green and blue LED's is creating white light,varition in one color(or one led)
can have a significant effect on the color point.In addition uniform
spatial mixing of the light from a small number of high power LED's is difficult to achieve.Great care be taken to ensure that color uniformity over the spatial light distribution from the LED lamp is at acceptable levels.
So the white light can be made from RGB, duplication will not be easy.

[veggii]

I wonder if this light will grow plants its red blue green
ColorBlast 12, Color Blast, LED Lights, Buy Color Blast, Rent Color Blast

here's a link to ledmagazine lots of info:
LEDs Magazine - Technology Channel

I f anyone wants to help me out I am still in need
I am trying to string 12 5watt LedEngin Bulbs
http://www.ledengin.com/products/5wLZ/LZ1-00R205.pdf
to a Advance Driver
Advance Transformer Ballast - LED Drivers - signPRO® (LED)
any help will be appreciated

[oldmac]

Nothing wrong with white in my opinion. Everyone keeps telling me I'm crazy, but white light seems to work pretty well for fluoros and HID. Just as with those, LED's have many different whites. Just make sure you use the right ones for the individual stages of growth.

Opie,
Had the same thought awhile ago, but my testing w/ white LEDs last year was less then stellar. Plus LED whites are not rated like fluros in degrees Kelvin, but rather an x/y plot. Hard to figure which is which.

My solution was to combine Red Cree XR xlamp LEDs with T5 fluros.
I've replaced a 600w HPS with 160w of LED and 198w of T5.
I'm 1/2 way through 2nd try with it and it works great!

I see no reason why the correct warm white LED could not replace the furos.