DiY LEDs - How to Power Them

Any suggestions on a good driver or drivers to power 250 watt vero 29 panel with 5 cobs

Use multiple drivers.

I think 4 would run on one of the meanwell hlg 185 series. Use a separate driver for the other one

I am building an 8 cob panel. 4 cxa 3070 3000k z2 and 4 cxa 3590 5000k cb.

The 5000k will begin veg dimmed. Turned up after a time. Followed by the 3000k dimmed and then increased.
I decided on running mean well hlg drivers, I think I like the c1050a. I have read so many scenarios I need some one-off confirmation.
Can someone please tell me the differences between say hlg185h-c700a, c1050a, and c1400a.
Is there a better choice for 3070s or 3590s? Or should I use the same?
Any help would be appreciated.

Hello
Even me, has a noob, knew that you need a hlg-185-1400 for 4x3590 everyone speak about it everywhere on this thread. Just read a few post.
Almost everybody know it...
But to answer me about Vero10 there's no one's know!?!
May i run vero10 in parallel and anyone know a driver (not less than 90% efficient) for 8, 10 or 12 Vero10 and one for 1 Vero10 to get the vf of each cob if i have to pair them.
Thanks

Another thing:why do you put your cob this way: 2, 1, 2, 1, 2 and not 2, 2, 2, 2?
I believe that there's too much light in the middle or not enough on the sides.
Just draw some circle on a piece of paper to give you an idea of what I mean.
Am I wrong?
C.U

Bhookus said:

View attachment 3443870 View attachment 3443870 I am building an 8 cob panel. 4 cxa 3070 3000k z2 and 4 cxa 3590 5000k cb.

The 5000k will begin veg dimmed. Turned up after a time. Followed by the 3000k dimmed and then increased.
I decided on running mean well hlg drivers, I think I like the c1050a. I have read so many scenarios I need some one-off confirmation.
Can someone please tell me the differences between say hlg185h-c700a, c1050a, and c1400a.
Is there a better choice for 3070s or 3590s? Or should I use the same?
Any help would be appreciated.

Click to expand...

What size heatsink is that?

10"x24" heatsink from heatsink usa.

You can run in parallel although its not recommended. Run them in series. Pick a driving current. Find a driver that provides the current youre after. 350mA looks nice for vero10. Maybe use hlg-120h-c350?

You can fit 16 x vero10 on that driver almost perfectly. Good luck, play nice!

littlejacob said:

Hello
Even me, has a noob, knew that you need a hlg-185-1400 for 4x3590 everyone speak about it everywhere on this thread. Just read a few post.
Almost everybody know it...
But to answer me about Vero10 there's no one's know!?!
May i run vero10 in parallel and anyone know a driver (not less than 90% efficient) for 8, 10 or 12 Vero10 and one for 1 Vero10 to get the vf of each cob if i have to pair them.
Thanks

Click to expand...

You are dealing with a circular footprint. The overlap of 2,1,2,1 provides you more even coverage than 2,2,2,2. With 2,2,2,2 you get neglected areas in the middle of your canopy. Dont take my word for it......just ask PetFlora.......

littlejacob said:

Another thing:why do you put your cob this way: 2, 1, 2, 1, 2 and not 2, 2, 2, 2?
I believe that there's too much light in the middle or not enough on the sides.
Just draw some circle on a piece of paper to give you an idea of what I mean.
Am I wrong?
C.U

Click to expand...

littlejacob said:

Hello
Even me, has a noob, knew that you need a hlg-185-1400 for 4x3590 everyone speak about it everywhere on this thread. Just read a few post.
Almost everybody know it...
But to answer me about Vero10 there's no one's know!?!
May i run vero10 in parallel and anyone know a driver (not less than 90% efficient) for 8, 10 or 12 Vero10 and one for 1 Vero10 to get the vf of each cob if i have to pair them.
Thanks

Click to expand...

No, I've read many posts on here and 1400ma isn't the only driver in that series people around here use. @REALSTYLES used 2x c700a on his 8x cob unit. That is the one I based my build off. He says he is running his dialed back to 350ma too, for heat control of his room. I want to spend my driver money the best I can because I will likely change out emitters before drivers. This is a basement grow, so overheating is not too much of a concern.
I've spaced them in that manner because veg stage wants a cooler light while flower wants a warmer light. When I start my veg the plants will be small and centered under the light. As they get bigger I will add the warmer light and increase the spread to cover the larger area.
I am concerned I've got them too close to the side at 1.25". @REALSTYLES suggested I move in to 1.5" which I will do unless that is still not enough.
Someone please correct me if I'm wrong

littlejacob said:

Another thing:why do you put your cob this way: 2, 1, 2, 1, 2 and not 2, 2, 2, 2?
I believe that there's too much light in the middle or not enough on the sides.
Just draw some circle on a piece of paper to give you an idea of what I mean.
Am I wrong?
C.U

Click to expand...

Yea he's fine with a 24" heatsink, I have a 28" heatsink with 8 cobs on it very similar to his, except my middle four are closer together and have two more singles on the outside. When measuring with my apogee meter the falloff is a lot less than what you would expect. Think it's the viewing angle of the cobs.

Scotch089 said:

Yea he's fine with a 24" heatsink, I have a 28" heatsink with 8 cobs on it very similar to his, except my middle four are closer together and have two more singles on the outside. When measuring with my apogee meter the falloff is a lot less than what you would expect. Think it's the viewing angle of the cobs.

Click to expand...

What do you think of the 1.25", should I push them in a bit?

nogod_ said:

You are dealing with a circular footprint. The overlap of 2,1,2,1 provides you more even coverage than 2,2,2,2. With 2,2,2,2 you get neglected areas in the middle of your canopy. Dont take my word for it......just ask PetFlora.......

Click to expand...

The 2,1,2,1,2 may have more even heat distribution on heatsink as compared to 2,2,2,2.

Bhookus said:

10"x24" heatsink from heatsink usa.

Click to expand...

Same as REALSTYLES
page 1 on https://www.rollitup.org/t/cob-efficiency-spreadsheets.865238/ for cxa 3070 3000k z2

Since you have 4 X cxa 3070 3000k z2 you multiply Vf50 with 4
Now goto www.meanwell.com/catalog/led/meanwell_LED.pdf and find a constant current (CC) power supply can can do Vf50 X 4 Volts
HLG-120H-C1050 = 74~148V, 1050mA can power 4 X cxa 3070 3000k z2 @1.05A

I think Realstyles was using 72V cree version instead of 36
HLG-185H-C700 , 143~286V, 700mA, 70*4= 280Volts

for 36V Cxa3590 , Vf around 35v x4= 140Volts
HLG-185H-C1400, 94% efficient , 71~143V, 1400mA, can power 4

SomeGuy said:

I think 4 would run on one of the meanwell hlg 185 series. Use a separate driver for the other one

Click to expand...

The Meanwell HLG-185-c1050 says 95v-190v at 199.5 watts. The vero 29 CRI 80 says 36.8 volts. So is this the one I want to power 4 vero 29's?

Bhookus said:

What do you think of the 1.25", should I push them in a bit?

Click to expand...

Spacing in between cobs? I think that's pretty tight. But at the same time mine probably are not more then 3" apart driven at 700mA, lights are out for flower right now but at 350 mA at say.... 3 in spacing at the closest point and 6 in spacing at the furthest I am getting 750 umol at 14", at 350 mA.

Here.... maybe this will help



I can get exact measurements of the distance in between each cob for you if you really want but that's ~9 hours out.

Bonjour
Hello growerz!
I believed that the cob (3070 and 3590) can light more than a square feet, 1 and a half maybe, so why do you keep them so tight?
I thought one advantage of the cob and led is the light spreading?!
So isn't it better to give them more space? For a 100x100 growbox and 4 cree 3590 i plan on put 1 in the middle of 50x50, 4 times, i believe it is better than put the 4 on a large H.S in the middle of the box!? What you guys thinking?
And for the driver...lol.I think i understand a bit more than you, so i found many driver for the vero10 but nothing up 86% efficiency and i would like 90% minimum, so if you know a 250mA 7w 26Vf or 14w 52Vf 30w 104Vf IP 67 90% efficient (is it ok? I'm still not sure...) please let me know
Have a great day★

And for the cxa it is 3 with the hlg 185 if i well learn my lessons...lol
But it is 4 with the cxb.i know it cause I make a lot of research on it!
But ask to someone who have more experience, but I'm pretty sure, since I am going to buy 3590 x4 and a hlg 185 1400b after i found a driver for my vero10 to practice a little before the Cree, anyway it is going to be made for september (too hot to grow in my area in summer).
C U

I keep them tight because I drive them so low. (700maA) the overlap keeps the umols high and the system efficient.. just a significantly higher up front cost (~1k, to cover a 2x3' how I want) but with the parts I put into such a small build I could just as well cover a 4x4 if I ran the 8 cobs harder. If you wanted to cover a large space with less money, you could run them at 1400mA or if you can find a driver, up to the 2800mA limit.

Bhookus said:

View attachment 3443870 View attachment 3443870 I am building an 8 cob panel. 4 cxa 3070 3000k z2 and 4 cxa 3590 5000k cb.

The 5000k will begin veg dimmed. Turned up after a time. Followed by the 3000k dimmed and then increased.
I decided on running mean well hlg drivers, I think I like the c1050a. I have read so many scenarios I need some one-off confirmation.
Can someone please tell me the differences between say hlg185h-c700a, c1050a, and c1400a.
Is there a better choice for 3070s or 3590s? Or should I use the same?
Any help would be appreciated.

Click to expand...

1.5" on the 3590's and 1.25" for the 3070's I didn't pay attention that you were using 3070's but beforew you drill holes place the cob holder at 1.25" first on the 3070's ands see how it looks because you don't want them too close to the edge