Building a Home Made LED

[hempfield]

I'm coming across lots of different information about heatsinks. I'm trying to figure out how much heat my heatsinks can dissipate. Dimensions are 250mm (L), 30mm (D), 40mm (H). It has 27 fins so that the surface onto which leds would go is 250 by 30.
It seems that many recommendations fall between 5 and 10 square inches per watt. But I'm having a hard time figuring out what I should take as the useful surface area of the heatsink!
I'd like to put 6 xml on there, at about 5w each, perhaps a bit less. Light fan cooling. Any known guidelines for my calculations?

I used a 200x100x25mm heatsink and 92x92x20mm PC fan for 10x XM-L U3, driven at 2500mA. The heatsink temperature is 40-42 degrees Celsius with fan running and the power meter indicates a 99W consumption : https://www.icmag.com/ic/showthread.php?p=5620318#post5620318

 

[Just me]

Enclosures...

Enclosures...

Hi,
The electronics-part of designing/building my own growlight isn't a huge problem for me since I love to tinker with micro-controllers/electronics and have... been growing MJ for a while. One thing that I am having problems with is finding good enclosures to house the growlight(s) that I want to build. As electronics hobbyist I normally use enclosures of old equipment to house my projects. Instead of (for example) using an old desktop PC with 1 or 2 covers open I wouldn't mind finding more professional box(es) to house all electronics of a growlight though. It's a pity I don't have the knowledge/equipment to make my own enclosure-stuff, I also haven't read all 45 pages of this thread to see whether my question has been asked before, but does anyone know where I could find "growlight"- enclosures for a reasonable price ?

 

[rives]

One thing that I am having problems with is finding good enclosures to house the growlight(s) that I want to build.

This was probably the most difficult thing for me to deal with - I wanted an enclosure to protect the components and give a finished look, and wound up with about the same time & money into the cabinet as I did the rest of the components on my Hybrid fixture. The VolksLED was a reaction to that, you might find an answer there. The enclosure that I used for the drivers and ballasts on the Hybrid came from Par-Metal.com. The last time that I checked, their site was up but they were on hold as a result of a fire at their facility. They make nice enclosures for a reasonable price, and will do custom work.

You might take a look at the aluminum enclosures from Bud on Mouser.com. They have some things that might be adaptable to what you want. Onlinecomponents.com has a smaller inventory, but killer prices and reasonable shipping.

 

[tenthirty]

Ya, boxes are indeed the hardest part.
Have you considered getting a sheet metal sheer and break and making your own?

 

[autojuice]

Aluminium project boxes

Aluminium project boxes

Would a aluminium project box work? Google has some nice ones.

 

[rrog]

Have a link autojuice?

 

[autojuice]

well

well

Have a link autojuice?

Here are some http://www.aliexpress.com/promotion/diy_aluminum-enclosure-diy-promotion.html but google is full,just look for the piccy search

 

[rrog]

Thanks much.

 

[tebos]

I didn't read the whole thread, just skimmed a bit here and there, so sorry if this has been asked a lot: why are you using neutral white LEDs?

A warm + cold white tint should cover almost the whole spectrum, maybe supplement the reds a bit more.

 

[PetFlora]

Cause ONE 22w 850 lumen NW (5000K) is all you need to veg

3/26 and 4/10

View attachment 216831
View attachment 216830

 

[tebos]

Yes, ok, for vegitating, but for flowering WW and CW have a broader spectrum. Or am I missing something?

 

[PetFlora]

You are, but that's ok. You only need ~ 10% blue for veg or flower. Plenty of blue in either NW or WW. What we want more of in flower is 630-660, with 660 only accounting for ~ 10%

Here they are in flower

View attachment 216832 View attachment 216833

View attachment 216834 View attachment 216835

Go to my thread for details

 

[tenthirty]

IMHO, anything over about 30% blue in flower would be counterproductive and produce more leaf matter vs bud.

 

[tebos]

Thanks!

 

[xmobotx]

IMHO, anything over about 30% blue in flower would be counterproductive and produce more leaf matter vs bud.

i humbly agree and am currently watching some things to confirm for myself the effect of high blue

which i dont necessarily find to be un-desirable

whats more; tebos; referencing your earlier post about ww and cw

ww and nw seems to be the preferable spectra on paper while the cw seems to offer an intensity which may be advantageous ~i think 1 cw in the center while providing the bulk of the spectrum w/ the nw and ww might be the way to apply that

 

[tebos]

ww and nw seems to be the preferable spectra on paper while the cw seems to offer an intensity which may be advantageous ~i think 1 cw in the center while providing the bulk of the spectrum w/ the nw and ww might be the way to apply that

Yes, that's what I thought too, also CW is more efficient (highest bins I could find, at 1A):
CW (U3-1C) 150lm/W
NW (T6 3C) 130lm/W
WW (T3 7C) 105lm/W

So yes, CW is probably a nice addition in a cluster. But I'll go for WW+NW in my 3 emitter mini grow

 

[autojuice]

Help

Help

Got 10 xm-l neutrals in a string and powered by a mean well lpv 100 36.When i plug it in the leds just blink,whats wrong...wrong power supply or something else?

 

[xmobotx]

that is confusing

there are blinking supplies but that does not seem to be one

maybe it is faulty?

 

[Weezard]

More likely, it's not adequate to the load.
Try it with 8 or 9 emitters.

Weeze

 

[tenthirty]

http://www.mouser.com/ProductDetail/Mean-Well/LPV-100-36/?qs=rBrhZj%2buXXr9w3ntxcNeIw==

constant voltage= 3.6v per led.......

http://www.cree.com/~/media/Files/C...d Modules/XLamp/Data and Binning/XLampXML.pdf

bottom of page 4 you're out of the range for the leds.