First run with DIY Xml2/Xpe/Rebel ES panel [Tangerine Train-wreck Haze & Juicy Fruit]

Alex281

Well-Known Member
Hey all!

so after a super long time of being interested with led lights and all the possible combinations of different spectrums, i finally decided i would take my learning one step further and make myself an led light. although my vipars are doing one hell of a kickass job i figured this would be a good opportunity to have a little fun.

now im not an expert by any means so if you have something to suggest or call me out on a critical error please do! we are all here to keep learning.

so here are the specs of the light.
-it draws about 51-53w from just the leds and another 7-8w from the 2 cooling fans
-i used a makers led heatsink and it made things a hell of a lot easier than i thought.(was going to make a diy tutorial but found it pointless since all i did was place the leds on the heatsink with a dot of thermal grease and solder them in series to the driver.)
- initially i wanted to fit all the leds i have now on a 6" panel but was afraid it was too small. i now realize it was the perfect size and decided that if this test goes well, i will buy the same amount of leds and double up since i have the 12" heatsink

For the Leds i used
2 Neutral white 5000k cree xml2's (running @ 1750ma)
3 warm white 2700k xml2's (running @ 1750ma)
6 cree xpe red's (running @ 700ma)
4 phillips rebel deep red's (running @ 700ma)

im a little concerned about there not being enough blue in the mix so if anyone wants to chime in about that please do!


the space ill be using for this relatively small grow is the bottom part of the cabinet where im flowering with my main vipar panels. usually it is where the buckets and all the wires are hidden but i pushed the bucket to the side and covered it with some panda film until i get a better lightproof bucket.
P5061074.jpgP5061077.jpgP5061079.jpg

The strains are juicy fruit which i got for free from a friend(hoping its as good as he says) and tangerine trainwreck haze which i got 6 as a freebie from sea of seeds a while back. hoping the genetics are good so the only thing i have to worry about doing its job right is the light. the seeds are germinating as we speak!P5061080.jpg

hope this will be a good show!

Happy Growing RIU!:bigjoint:
 

SupraSPL

Well-Known Member
KNNA recommended 15-20% blue output for flowering lamps. I used 18% and was happy with the results. It is a complicated calculation with a large margin of error because we need accurate SPD graphs which Cree does not seem to provide us. We also need to know the radiometric efficiency at the drive current which we are also not given.

Then we need to estimate the junction temp. Do you know your heatsink temp? Your heatsink is about 400 sq in and you are dissipating about 37 watts. If you were passive cooling I would suggest 24 watts for that heatsink but since you are active cooled your Tj should still be in range with 37 watts.

I counted boxes on SPD graphs to estimate the % of blue output. For warm white it is about 10%. For high CRI 5000K it is about 20% blue so I guesstimate the XML2 5000K is 23% blue.

NW boxes 23% or  20% high cri.jpg

I calculated radiometric efficiency of XML2 5000K T6 bin to be 42.3% (1750mA 50c) The XML2 3000K T3 bin is 31.6% efficient (1750mA 50c). Do you know the bin of your 2700K?

The XPE red P3 bin is 42.4% efficient (700mA 50c). The Luxeon deep red EX6 bin is 38.4% (700mA 50c).

The XM-L will dissipate 5.33w (1750mA 50c). The XPE 1.54w (700mA 50c) the Luxeon 1.73w (700mA 50c).

(2) NW = 10.66w * .4 = 4.26 * .23 = 1w blue
(3) WW =16w * .3 = 4.8 * .1 = .5w blue
(6) XPE = 9.24w * .42 = 3.88
(4)LUX ES= 6.9W * .38 = 2.63

Total emission = 15.6w
Total blue emission = 1.5w

So you are correct the blue output might be a tad low at ~10%. It would depend on the plant, apparently some prefer less blue than others during flowering.
 

Beefbisquit

Well-Known Member
That light looks killed! Love that you're driving the LED's that hard for maximum umoles.... lol Lifespan/efficiency be damned! :D

Fantastic spectrum too, very similar to one I've been playing around with, and posted in another thread!

spectrum - creeNWWWCW ledengine.jpg
 

Alex281

Well-Known Member
Wow guys! thanks so much for the info and graphs!

heres a pretty cool link i used when i was choosing my leds
http://www.cree.com/~/media/Files/Cree/LED Components and Modules/XLamp/Data and Binning/XLampXMBL.pdf

for the bins of my leds"
-941-XMLBWT020HT20E8
XMLBWT-02-0000-000HT20E8
Warm White, 2700 K

-941-XMLBWT000LT60E3
XMLBWT-00-0000-000LT60E3
Neutrl White, 5000 K

-
XPE20STRRED-801


  • Philips Rebel ES part number LXM3-PD01-0300
as for the heatsink temps, right now its not even warm to the touch, its running very cool. i read somewhere on the makers led website that the heatsinks can dissipate a 100w worth for every 12" they also only supply one fan with the kit but i got 2. i dont have an Ir thermometer but my friend does and ill try to get him to bring it over so i can get a reading on the actual temp.

@beef yeah, the xpes and rebels are at full blast but i think they will be fine since the xml2's are only running at a little over half their max current so there shouldnt be to much heat to kill things(i hope:mrgreen:). care to share more about the leds you are messing with? there is literally a shit ton of info on RIU i havent got to, mostly because its just speculations and ideas and not much has been done to show any actual testing and what not. id love to see where others are coming from though so we can all build on our ideas.
 

PSUAGRO.

Well-Known Member
Very nicely done Alex.......i'm subbed for sure and no doubt in my mind that your gonna rock this grower!

Also like your led choices and spectral distribution.....should flower well IMO.
 

jubiare

Active Member
Alex
Hey Man, well done you already up and running it
It didn't take you long eheh
You've must been an avid diyer during the last week eheh!

Nice one and by the way we run a similar spectrum and conf I'll post a pic Tomo so you'll see how similar! Been busy with else eh!

Best of luck and enjoy you must be pretty chuffed!

feels good I bet

J.
 

Alex281

Well-Known Member
Very nicely done Alex.......i'm subbed for sure and no doubt in my mind that your gonna rock this grower!

Also like your led choices and spectral distribution.....should flower well IMO.
awesome to have you a long for this! i gotta admit, seeing the way you had your small lights setup and the airpots influenced this setup quite a bit!
Alex
Hey Man, well done you already up and running it
It didn't take you long eheh
You've must been an avid diyer during the last week eheh!

Nice one and by the way we run a similar spectrum and conf I'll post a pic Tomo so you'll see how similar! Been busy with else eh!

Best of luck and enjoy you must be pretty chuffed!

feels good I bet

J.
super excited for this! thankfully the reflow with the xml2's went well. i ended up using my electric oven and put the leds right on the coils of the stovetop. pretty nerve wracking but everything turned out ok!:bigjoint:
 

Alex281

Well-Known Member
Beautiful photo Alex :)
thank you!

If the primary leafs reach toward the lights you have hit the blue sweet spot
hopefully! just a few more days until the ball starts rolling:bigjoint:
Looks like Alex got a new Camera^^^^^ and yes very nice pic------camera model alex????
ive been using an olympus om-d, most of my nice photos come from my macro lens (60mm f2.8 ) . i really love this camera, its small and takes incredible pictures.
 

pepperdust

Well-Known Member
amazing man..

love the heatsink, wanted to try one from them for a while now..


as for the blue, gonna keep an eye on this, as I always thought we might still be missing a tad blue in a flower panel with whites..



good luck, thanks for showing us
 

jubiare

Active Member
IMG_20130415_170309.jpg

Hey Alex, as you can see the MEvo3 has a similar conf/specs with your new toy!
One of them has 3 blue diodes, but just because I burned 14 xte's so I changed things around (a bloody driver issues I thought it was a short however such is life sometimes...)

So two strings of reds split equally between hyper red 660 and 630 reds
The middle string is whites most WW 2700, than NW 5000k and CW 8000k xte's

I basically switch any string off if I want, in fact I vegged with two red strings being off. Each red string is also different, in the sense that two are 12 660 and 8 630, the other two 12 630 and 8 660. For what is useful to have a dominating 660 or 630 reds? It can be good for some experimentation maybe ..

Good luck with yours, this conf is giving me good results yes you work with xml's but other than that we have very similar toys. I have the MEvo's up against a 250hps results are interesting as soon as I get more time I'll open up a thread or just post on yours if you don't mind.

cheers and happy gardening
j.
 

Alex281

Well-Known Member
amazing man..

love the heatsink, wanted to try one from them for a while now..


as for the blue, gonna keep an eye on this, as I always thought we might still be missing a tad blue in a flower panel with whites..



good luck, thanks for showing us
go for it! i spent a little more than i wanted to on the heatsink but the ease of use and finished look made it worth it.

View attachment 2654334

Hey Alex, as you can see the MEvo3 has a similar conf/specs with your new toy!
One of them has 3 blue diodes, but just because I burned 14 xte's so I changed things around (a bloody driver issues I thought it was a short however such is life sometimes...)

So two strings of reds split equally between hyper red 660 and 630 reds
The middle string is whites most WW 2700, than NW 5000k and CW 8000k xte's

I basically switch any string off if I want, in fact I vegged with two red strings being off. Each red string is also different, in the sense that two are 12 660 and 8 630, the other two 12 630 and 8 660. For what is useful to have a dominating 660 or 630 reds? It can be good for some experimentation maybe ..

Good luck with yours, this conf is giving me good results yes you work with xml's but other than that we have very similar toys. I have the MEvo's up against a 250hps results are interesting as soon as I get more time I'll open up a thread or just post on yours if you don't mind.

cheers and happy gardening
j.
i would love it if you kept posting progress reports to this thread!i really want to know how having a balanced 630 vs 660 will work out because while i was trying to research( i will admit my research was half assed to an extent) i just couldnt find and hard evidence with side by side tests to see the different effects of the different ratios of 630 and 660, i was a bit nervous to add more 660 and ended up being cautious as the hans panel which is successful has such a small amount. since our ratios of leds used are similar. this just might be the thread where the speculations stop and some form of evidence is shown.
 

Alex281

Well-Known Member
Hey all!

quick update! things are rolling a long really nicely, the plants had a really big stretch a few days after sprouting so i had to bend the stems into the dirt so now each plant is sitting at the opposite ends of the light for perfect spread.. I also fimmed about a week ago and i dont plan on touching them again. the tangerine train-wreck haze is noticeably wider with more indica looking leaves compared to the juicy fruit. i will be going on vacation for a month soon so ill have to leave them in good hands but no pics for a while!


juicy fruit
P6011500.jpg
tangerine train-wreck haze
P6011501.jpg
P6011505.jpg
P6011508.jpg
 
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