diy LED Lumina 5.2 Purchase help.

[banthonyb71]

In the process of buying 2 cree Lumina 5.2 for my first diy build. I plan on adding a third down the road. I wanted to make sure I'm getting everything I need minus heatsink because the makers sink won't work for what I'm tryna do. also I figured 250 watt power supply would be enough for 3.

not sure if I got correct amount of drivers. 9note I only purchase 2 5.2's but wanted to get all the drivers now.

CREE Lumia 5.2 - 70w Full Spectrum 5 Channel CREE LED
Conne​ctors​: Dual ​Molex​ conn​ector​s for​ CREE​ Lumi​a 5.2​ - Fl​yi...
Edit Options



Meanwell LDD-700H LED Driver Quantity 9 (three for each 5.2?)


Coralux 5UP LDD driver board 3 (1 for each chip?)


Meanwell LDD-1000H LED Driver 6(2 for each chip?)


250w 48v 5.2A DC Power Supply 1(is 250w enough for 3?)


Arctic Silver Céramique 2 - 25g


Cart Items Qty Item Price Item Total
Subtotal: $402.45
Estimate Shipping & Tax
Shipping Insurance: $11.67
Grand Total: $414.12


not sure if I got correct amount of drivers. 9note I only purchase 2 5.2's but wanted to get all the drivers now.

 

[Ktm898]

link does not work.

 

[Daimyo68]

Your list is correct. You will be able to add in the 3rd Lumia down the road without adding anything else (except maybe some more cooling)

 

[perkint]

Yeah - 5 drivers for 5 channels, 3 lots of the 5.2 so 15 drivers and LDD boards for 15 drivers. Each 5.2 is up to 70W so max of 210W on a 250W PSU should be fine. Not sure if 3 x 700mA and 2 x 1000mA is correct as I don't know for sure what LEDs are in the 5 Channels, but it is probably OK.

Tim

 

[Idefixes]

You don't need so much driver. With one 250W/48V you can power to lumia 5.2 in serie so with only one driver per chanel. Insted have 15-18V vf per chanel you will have 30-36Vf (aware with LDD-H rating and SMPS 250W/48V). You than need only 2xLLD1000h and 3xLDD700H for two lumia. To interconnect 2 lumia 5.2 you just have to connect one neg from one chip to the positive from the other. clay-boa sell premade interconnect wire

http://www.clay-boa.com/molex-connector-for-cree-lumia-5-2-interconnect/

5 driver (2x1000+3x700) will need more than 4.1A from PSU so on 250W/48v (= 5.2A) you can't use use more than 5 LDD => 1 or 2 (if in serie) lumia 5.2 per 250w/48V smps

 

[perkint]

5 driver (2x1000+3x700) will need more than 4.1A from PSU so on 250W/48v (= 5.2A) you can't use use more than 5 LDD => 1 or 2 (if in serie) lumia 5.2 per 250w/48V smps

That's not how it works. The input current varies depending on the input voltage and required output power, not output current - for example an LDD1000 running 24W of LEDs will only draw 500mA (well, a bit more, but not 1000mA) from a 48V supply.

Tim

 

[Idefixes]

Even you put 3 lumia in parallele with 15 driver => 210W you have not enough (16%) room on such basics SMPS for long time use....The smps will heat a lot...

 

[perkint]

I'd happily run one at 84% so long as it's a decent supply. But, what actual rating is the 5.2 running at on 700mA and 1000mA? As, if it really is 70W, i would check the fV of each of the strings. The LDDs are up to 97% efficient, but that varies depending on the fV of the strings compared with the input voltage. If they are not very much at the upper end of that, Idefixes may well be right and you'd be pushing the PSU very hard!

Tim

 

[banthonyb71]

You don't need so much driver. With one 250W/48V you can power to lumia 5.2 in serie so with only one driver per chanel. Insted have 15-18V vf per chanel you will have 30-36Vf (aware with LDD-H rating and SMPS 250W/48V). You than need only 2xLLD1000h and 3xLDD700H for two lumia. To interconnect 2 lumia 5.2 you just have to connect one neg from one chip to the positive from the other. clay-boa sell premade interconnect wire

That's not how it works.
T

I thought the same thing however when I went on to nanoreefs, looking for how many drivers I needed, a LEDgroup buy rep said the exact same thing. That I would only need 5 drivers for the first 2 but then 5 more for the 3rd.

So how many actually is it?

 

[banthonyb71]

ok, Im some what following along here but can you guys please dumb it down just a hair and briefly put this in lamens terms? again, first diy build. Can I run 2 Lumia off 5 drivers? and if so, what is the negatives of doing this, if any? thanks.

 

[perkint]

A single LDD can run any string of LEDs from 2V to 52V. But it always requires an input at least 3V above what it needs to output. And it can take a maximum input of 56V. Yeah, i know there is a stray 1V in there (52V max output, 3V difference between in & out should mean 55V max in), but give meanwell a break! It's only 1V.

So, you want to know if you can run two 5.2 chips from one driver. What fV is on that string? They have:

• Channel 1: 18V @700mA
• Channel 2 16.5V @1500mA
• Channel 3 16.5V @1500mA
• Channel 4 17.2V @700mA
• Channel 5 18V @700mA

Now by my reckoning that's more than 70W anyway, so I'm confused! More like 85W!!

But then reduce that by driving the two 1500mA strings at 1000mA and you take probably over 17W per chip out of the power, so brings it back to slightly less than 70W. But, anyway...

You have a 48V supply, so assuming that supply is not adjustable (most are, but you need to check!) that means a sinlge driver can run a string up to 45V. Well, i reckon any 48V PSU with enough power could run a couple of 5.2's off 5 LDDs. In fact, you could get away with easily running three 5.2s from a single meanwell 36V (adjustable) 350W supply which are pretty cheap on eBay and you'd only need 10 drivers and 2 driver PCBs that way

If this don't make sense or you want further details on owt, shout up. It's well gone midnight here and i should be in bed

Tim

 

[mkj]

I have the 5.2s

one board with two 1000ldd and three 700ldd will run two 5.2s. on that PS

If you want a third 5.2 for the future you will need a second board/LDD set. Just order the one set of board/ldd, you can get the second set if you order a third 5.2 later. No need to order them unless you end up getting a third 5.2

Now for the PS:

The 250watt will be fine with two 5.2s but I think the amps may be a problem with trying to use three Lumias on that PS. The one set of LDDs will be doing 4.1amps if maxed (3X700 + 2X1000), which is fine for that PS but add a second set of LDDs and amps go over that PS I think. I think with two sets of boards/LDDs you need to double that 4.1 amps to 8.2 amps which is over that PS you quoted but Im not sure if amps doubles or not with second board/LDDs on the same PS.

Personally I would use the 250 watt PS on two but I would get a second PS when/if order the third Lumia. Or, order the 500 watt that has 10.4amps. Overkill for two Lumias but good for three I think.

read http://www.reefcentral.com/forums/showthread.php?t=2372156 . Aqualund built a large one using many Lumias

I didn't see a controller on your list. You will need one. I'm using a reefangel for my lights but many people use the storm controller that's sold on that website if you just want it to control lights and nothing else.

 

[Daimyo68]

Ben at LedGroupBuy can confirm that the 250w PS will be more than enough to power 3 of the 5.2 lumia's

 

[Daimyo68]

clay-boa??? Not sure where that came from

LGB

 

[jedimasterben]

All channels of the Lumia at 700mA is around 58w. Bump CH2 and CH3 to 1A and that adds another 10, so right at 70. Taking them to 1.5A adds another 17w, so to around 85 like was mentioned earlier.

Let's say they're running them at 70w absolute maximum. If they're being run simply on/off, IMHO a 250w supply isn't enough, as the PSU will be at ~88% load after the LDD efficiency, which is a bit too close for my liking, especially not on a power supply like the HLG that can take it.

But if you are going to use them on a controller, the power supply will not have that sustained load for the full time the LEDs are on, so it should be fine.


Still a little close for comfort if they're running at full power for prolonged periods, but not many never even reach full power.

 

[Aqualund]

Don't go with the power supplies that led group buy sell. Spend the SAME amount and get a meanwell power supply from a place like TRC. I have replaced all of my led group buy psu's within a year due to failures.

 

[banthonyb71]

I didn't see a controller on your list[/B]. You will need one. I'm using a reefangel for my lights but many people use the storm controller that's sold on that website if you just want it to control lights and nothing else.

yea. I was going to use the storm. I was following this quote from ben at ledgroup buy towards a different cutomer "you'll only need two of the 5.2, in which case the easiest connection and control would be the 5up MakersDriver pro, one 180w power supply, 3x LDD-700H, 2x LDD-1000H (the 1000 will control CH2 and CH3), and the MakersController. For more advanced control and a less expensive option, you can use the same LDD and power supply, but the Coralux 5up board and the Storm or Storm X controller, the only caveat is that they are a less finished look and more difficult to hook up, but if you've got a little experience with electronics, it should be a piece of cake.

close for my liking, especially not on a power supply like the HLG that can take it.

But if you are going to use them on a controller, the power supply will not have that sustained load for the full time the LEDs are on, so it should be fine.


Still a little close for comfort if they're running at full power for prolonged periods, but not many never even reach full power.

So where could I find a power supply above 250 to be better safe than sorry? other than the 500watt at ledgroupbuy? someone mentioned ebay. any certain brand?

 

[perkint]

If using separate drivers per chip you can get a decent meanwell supply at 36V 9A which will easily be man enough

Tim

 

[jedimasterben]

Don't go with the power supplies that led group buy sell. Spend the SAME amount and get a meanwell power supply from a place like TRC. I have replaced all of my led group buy psu's within a year due to failures.

+1

Or step up to something like the HLG and get ultra high efficiency and IP65/67. The HLG can be both constant voltage and act as a power supply and as a constant current LED driver. They can be run up to ~95% load as a power supply before it switches to constant current mode. Even with a nearly full load, the HLG barely gets warm thanks to the metal enclosure. Those things scream high quality.

 

[Idefixes]

If using separate drivers per chip you can get a decent meanwell supply at 36V 9A which will easily be man enough

Tim

That's seems quite more reasonable.

Marc