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LED Power question.


Haelstrom

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I currently have 2 Lumia 5.1's over my 75g. I'm looking to add 4 Solderless Cree XT-E 3 up chips with 2 RB and 1 NW on each chip. And 4 Solderless Ocean Coral Whites. So my question comes down to my power and drivers. Each Lumia 5.1 is power by 5 Meanwell 700mA LDD and a 48V 7.3 AMP 350W Max Power Supply.

 

I want to add 2 of the XT-E 3up to the same channel as the Royal Blue on the Lumia on each.

Also put the Ocean Coral White on the same channel as the Cool Blue or Whites. Haven't fully decided if I want these or not. I'm not seeing the POP I would like to with just the Lumia's.

 

 

SO. Can a single Meanwell 700mA run the Blue Channel of a Lumia 5.1 and 2 Solderless Cree XT-E 3up? These are from LEDGroupBuy by the way.

 

Lumia 5.1 specs,
Channel 1 - Neutral White (base white spectrum) (36V @ 700mA)
Channel 2 - Royal Blue (base blue spectrum) (36V @ 700mA)
Channel 3 - Hyper Violet (enhanced growth) (38V @ 700mA)
Channel 4 - Deep Red / Turquoise (enhanced color spectrum) (32V @ 700mA)
Channel 5 - True Violet / Cool Blue (enhanced growth and color spectrum) (38V @ 700mA)

 

XT-E 3 up Specs.
Forward voltage:9v (700mA)

 

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At best, you would be able to add one of the XT-E 3-ups to the royal blue channel. One 3-up would be adding 9v to an existing 36v string, making it 45v. That's really close to the limit that the LDD likes for additional overhead. You could turn the output on the power supply up slightly, but that still wouldn't give you enough room to add a second XT-E on the royal blue channel.

 

Same basically goes for the OCW. That would add 9.2v to a 32v string, giving you 41.2v. Again, even if you were to max out the power supply (should go up to about 52v), you don't have enough room for a second OCW and the required overhead for the LDD.

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At best, you would be able to add one of the XT-E 3-ups to the royal blue channel. One 3-up would be adding 9v to an existing 36v string, making it 45v. That's really close to the limit that the LDD likes for additional overhead. You could turn the output on the power supply up slightly, but that still wouldn't give you enough room to add a second XT-E on the royal blue channel.

 

Same basically goes for the OCW. That would add 9.2v to a 32v string, giving you 41.2v. Again, even if you were to max out the power supply (should go up to about 52v), you don't have enough room for a second OCW and the required overhead for the LDD.

Thanks evilc66. That is what I needed to know. I figured it would be pushing it. So I'll go with plan B and add another LDD for each of the two. One for the 3ups and one for the ocw. Then chain then off the PWM out put on the controller. It isn't a huge deal. Just another $24ish. Hope the wife doesn't notice.

 

So do you think that these additions might give me some more pop to my corals? The problem I've found with the Lumia 5.1 is the whites become active when you power up the royal blues. It never lets me get that real blue look. So only the really bright green colors glow nicely. The lower toned greens become kinda washed out. If I crank only the cool blues up I get a nice glow on everything. But once the royal Blues go up the whites come with it and washes it out. It's still nice. But not that pop you see so much under other lights.

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