Building a Home Made LED

[tenthirty]

Look up CXA3070.....I think that they are the best at this point in time. My first completed run with these shows great results.

For side lighting XML2's are hard to beat.

 

[thaichimaster]

Thank you man, for suggestion. I might compare and choose cree's cxa 2520 Nichia chips because i think it's better if I spread light more evenly with smaller cobs, though my first tought was also cxa3070 but maybe to strong for my 40x60cm box and I only have 90cm of height.

For side lightning xml-2s are gonna be .

Bye

 

[tenthirty]

running the 3070's at 700ma would do the trick. 25w each at 49% efficiency.
If it was me I would do 4 of these in your space. Don't forget the orca film;-)

 

[Dion]

running the 3070's at 700ma would do the trick. 25w each at 49% efficiency.
If it was me I would do 4 of these in your space. Don't forget the orca film;-)

how do you find the efficiency specs on the cobs?

also have you seen the CXB(CXA2) mmmmm

 

[tenthirty]

The data sheets from Cree give all of the specs.
Oh yes.....I'm trying to get samples now.

 

[Dion]

The data sheets from Cree give all of the specs.
Oh yes.....I'm trying to get samples now.

digikey has them, not sure about the binning, i saw a 3590 and i think a 3070 on Edit: ab bins 40 bucks

i still cant find the specs for efficiency at dif amps...

 

[tenthirty]

http://www.cree.com/LED-Components-and-Modules/Products/XLamp/Arrays-NonDirectional/XLamp-CXB3070

Go to documentation,click the top document that you can get.
ds CXB3070.pdf, page 6.

You can derive lumin's per watt from there...etc..

http://en.wikipedia.org/wiki/Luminous_efficacy

 

[Jeeyah]

I'm planning a light to replace a 1000HPS. I want it to take a shit on the HPS. It's not worth planning and building a light unless it's going to be better.

I plan on using (9) CXB3070 or Vero 29. For drivers, Meanwell LPF-90's or HLG-80-H. I'll post some pictures once the light is built.

 

[PetFlora]

I'm planning a light to replace a 1000HPS. I want it to take a shit on the HPS. It's not worth planning and building a light unless it's going to be better.

I plan on using (9) CXB3070 or Vero 29. For drivers, Meanwell LPF-90's or HLG-80-H. I'll post some pictures once the light is built.

For those of us who lack the skills to DIY a panel equal to 1000w hps, check this out 6 COBs, each encircled with various spectrum enhancing diodes + UV-b @ 350w $895

http://www.amaretechnologies.com/se.350.uv.html

 

[Jeeyah]

1000 Watt HPS Destroyer

1000 Watt HPS Destroyer

I'm planning a light to replace a 1000HPS. I want it to take a shit on the HPS. It's not worth planning and building a light unless it's going to be better.

I plan on using (9) CXB3070 or Vero 29. For drivers, Meanwell LPF-90's or HLG-80-H. I'll post some pictures once the light is built.

This is how you take a shit on HPS.

1. 16 COBS have a better spread than 5 or 9. (I was trying to save by running fewer COB's).

2. HLG-185H-C1400B is 94% efficient versus LPF-90 @ 90% efficient.

3. Using the HLG to run 4 COBS at 1.4 amps versus 1.9 amp on the LPF, I think you gain about 4% efficiency. (I think)

You can do this with less COB's or cheaper drivers. But, to take a shit on the 1k, this seems like the way to go.

 

[Dion]

This is how you take a shit on HPS.

1. 16 COBS have a better spread than 5 or 9. (I was trying to save by running fewer COB's).

2. HLG-185H-C1400B is 94% efficient versus LPF-90 @ 90% efficient.

3. Using the HLG to run 4 COBS at 1.4 amps versus 1.9 amp on the LPF, I think you gain about 4% efficiency. (I think)

You can do this with less COB's or cheaper drivers. But, to take a shit on the 1k, this seems like the way to go.

sounds absolutely rad!

16 cxb3070 @ 1.4 A?

so thast 900 watts already? less lumens than a 1000w hps but i think u will win by bringing it a lot closer to the canopy for sure seen as heat isnt projected off these if u build this light it will be the build of the century plz keep us updated

also at petflora; there is no way that silly hyped up light you sell could touch an 1000w hps (400w possibly) if im wrong prove it(independent testing)

 

[tenthirty]

......and those 16 COB's should cover 32-36 sq ft.

Ask me how I know.

 

[Weezard]

How do you know?

 

[tenthirty]

Here's what I know.



I've done about 15 runs on these.

 

[Dion]

Here's what I know.

View attachment 312028

I've done about 15 runs on these.

i see you also like to run each cob as its own light not a single panel
thats how to use LEDs friend

very nice

 

[sprinkl]

so thast 900 watts already? less lumens than a 1000w hps but i think u will win by bringing it a lot closer to the canopy for sure seen as heat isnt projected off these if u build this light it will be the build of the century plz keep us updated

Is distance really that important? If you have good reflective material on the walls you shouldn't lose much % to reflection... And in multiple light rooms even less so, as you get better overlap which improves yield.

 

[waveguide]

yes, yes it is..

http://en.wikipedia.org/wiki/Inverse-square_law

 

[REALSTYLES]

My panels rock hahaha. I'm a Gargoyle that's only 744 watts in a 4x8 tent

 

[tenthirty]

4x8=32
744/32=23.25 w sq/ft

Nice!!

Half the power of hps and better results, and that doesn't count cooling.

 

[Jeeyah]

What do you guys think the ideal spacing is?

50 watt COB 12-14" apart?

75 watt COB 14-16" apart?

Seems like it depends on application.