DiY LED - Cree CXA3070

SupraSPL

SupraSPL

Well-Known Member
I would be wary of it in terms of efficiency, but yes it would work. I have a radio shack adapter with 3V 4.5V 6V 7.5V 9V 12V and it is only 50% efficient or less on each setting. But, it is an older adapter maybe these newer ones can perform at a more reasonable efficiency?
 
Romz1

Romz1

Member
Okay thanks, I will probably order one and do some measurements to see how efficient it is... :) Btw how do you connect all these fans in series? Like COB? or?
 
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Elibrium

Member
Finally got my drivers! And a few of these came with them, have you guys had any expeirence on these Chinese cobs? They are supposedly 6500k. Would the extra spectrum be beneficial or worth putting 1 or 2 of them in a string with my 2 cxa3070 5000ks? I'm going to use a few for a flood light on my workbench.
 

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happy75

happy75

Well-Known Member
Elibrium said:
Finally got my drivers! And a few of these came with them, have you guys had any expeirence on these Chinese cobs? They are supposedly 6500k. Would the extra spectrum be beneficial or worth putting 1 or 2 of them in a string with my 2 cxa3070 5000ks? I'm going to use a few for a flood light on my workbench.
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Chinese cobs, I have also some of these (7000k, about 70 watts), they are not the best leds in town, but good for vegging not for flowering if you ask me.
 
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Elibrium

Member
happy75 said:
Chinese cobs, I have also some of these (7000k, about 70 watts), they are not the best leds in town, but good for vegging not for flowering if you ask me.
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Ya I am wondering for a veg light maybe 2 of these cheapos and then 2cxa3070 5ks dimmed to like 100watts total or if I may as well stick with just the two 5ks cxa's
 
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avnewb

Well-Known Member
Chigur said:
16w/sqft is good for clone or maybe early vegging, if this is a flower room...Ad more.
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Yup for flower so plan to go to 20 - CXA3070 ABs but for now just have 4 plants under it which have done ok being that mostly 3k. Moved two smaller ones to under new light.

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SupraSPL said:
It is exactly on target, good info :) You can put dabs of silicon over the exposed high voltage points to reduce the chance of grabbing it accidentally, especially the AC side. I would also recommend grounding the heatsink frame so if it gets energized accidentally for any reason it will shut down the breaker instantly rather than "surprising" you when you grab it.
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Yup. Grounded the frame. Used bike lifts again as $10 for two and make easy to raise.

First test room got up to 97 from 77 it used to peak at and heatsinks were pretty warm. Now have a honeywell turboforce fan on cool ground pointing up and temp in room goes to 82 to 84. Fully sealed room no intake or exhaust.

So six arrays of five vero 10s with 36w fastech drivers mounted on 5x 50" x 2.8" heatsink bars welded together.


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reasonevangelist

Well-Known Member
okay, i just can't resist doing this...
uzerneims said:
i would go with those chinese as sucklemental lights.
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Good call.


But seriously, you could even just use it to build a demo lamp, just to have 'around', so you can show select people why LED lamps are Awesome.

you:
"yeah, this one isn't even that good... but look how bright it is! [BEAM]"

them:
"AHHHGHHH, I'M BLIND! WTF MAN!!! WTF IS WRONG WITH YOU!?!?"

you:
"...seriously? Dude, it's just photons, relax."


Should probably use a really low current driver if you plan to do anything like that.

I'm pretty sure our lamps can be seen from space.
We should like... try to coordinate a mass cob-signaling of some kind: everyone get their lamp and aim it at the full moon at the same moment! Or the space station. They could even look for it at night, as they orbit above. Cree should do that as a publicity stunt. Spell "CREE" across america, at night, with their own cobs. If i was Cree, i'd totally do that. They could then expand into marine submersibles, and drop a huge 'CREE' sign in the ocean...s, oceanS, plural, as in all of them. Like giving Earth a bunch of Bling.
 
uzerneims

uzerneims

Well-Known Member
reasonevangelist said:
okay, i just can't resist doing this...

Good call.


But seriously, you could even just use it to build a demo lamp, just to have 'around', so you can show select people why LED lamps are Awesome.

you:
"yeah, this one isn't even that good... but look how bright it is! [BEAM]"

them:
"AHHHGHHH, I'M BLIND! WTF MAN!!! WTF IS WRONG WITH YOU!?!?"

you:
"...seriously? Dude, it's just photons, relax."


Should probably use a really low current driver if you plan to do anything like that.

I'm pretty sure our lamps can be seen from space.
We should like... try to coordinate a mass cob-signaling of some kind: everyone get their lamp and aim it at the full moon at the same moment! Or the space station. They could even look for it at night, as they orbit above. Cree should do that as a publicity stunt. Spell "CREE" across america, at night, with their own cobs. If i was Cree, i'd totally do that. They could then expand into marine submersibles, and drop a huge 'CREE' sign in the ocean...s, oceanS, plural, as in all of them. Like giving Earth a bunch of Bling.
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There is book about that, where NASA scientist trying to prove very much false theories, like everyone jumps at time, or if everyone take a mirror and take that reflection to moon and stuf like that ;D
 
nvhak49

nvhak49

Well-Known Member
Are the Z2 3000k cobs still good? I can't find any z4 or ABs anywhere, anyone know where else I could get two?
 
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avnewb

Well-Known Member
So for now im just adding 15 Vero29 3k to the six 3070 3ks for the flower in the ~29sqft area and can move the 2 cxa 3070 5Ks to veg area.
Mounting v29s on 15 more Arctic 64s.
EDIT
just realized I should have bought arctic 11s to fit vero29s. Was able to cancel and order them instead.

/edit

Were 19% off so figured I would get them @$22 a piece. Veros and possibly other things are on sale at Newark.com for up to 20% off thru tomorrow.
I forgot to order the 5 more vero 10s that I need but they told me cannot change order, have to place a new one and pay shipping again...
The 35 vero10s I just got from digikey would have been like $40 less with this discount.


Anyways,
Ideally I replace the LPC- 60-1400s drivers as well with better ones, but for now just need to get drivers of the Vero 29s that will get me going.

Thinking 15 - PLP-60-48 drivers would be the best option for price. Not as efficient as say the HLG-185H-C1400 you recommended but can work on that over time...I tried to search and research to find other options but not sure there is one without double price. Unless something with ~1400ma that has up to 90v that is less than $38 or 130v for less than $55...
 
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avnewb

Well-Known Member
Greengenes707 said:
I really think reflectors are great. I have done small test with gloss white poster board and it can increase your par readings by 25% on the outer edges sometimes.
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So from yours and @SupraSPL posts I decided to make reflectors from aluminum welded to the heatsink painted white.

Should be able to use flashing to cut the truncated cone that will be the reflector once I make a good trace.
 
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Romz1

Romz1

Member
Hey guys, I am looking for HLG-185H-C1050 (A or B version), any ideas where I can buy it with delivery to Europe? (for a good price) :-)
 
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