DIY LED Array build

<a href=showthread.php?s=&postid=15392402#post15392402 target=_blank>Originally posted</a> by CHOMPERS MFK
Does anyone have a formula or rule to go by in terms of lumens? I've been running LED's on my tank but I'm not confident that the output will be enough. I have been able to grow tons of hair algae (new tank) and one of my mushrooms is dividing, but I don't want to venture into any real corals until I know that they can survive in there. The LEDs that I bought only had lumen/Watt ratings.

Can you post specs of your setup (tank dimensions, number of LEDs, model and bin of LEDs, drive current, optics, etc.)?
 
Montipora Digitata I believe...............

<a href="http://www.flickr.com/photos/40220688@N05/3744623162/" title="PICT0401 by sphil876, on Flickr"><img src="http://farm3.static.flickr.com/2573/3744623162_e0390b22a6.jpg" width="375" height="500" alt="PICT0401" /></a>

Seriatopora ORA maybe :confused:

<a href="http://www.flickr.com/photos/40220688@N05/3743829029/" title="PICT0413b by sphil876, on Flickr"><img src="http://farm3.static.flickr.com/2518/3743829029_198c1f4ba5.jpg" width="500" height="378" alt="PICT0413b" /></a>

Frag tank pic after new additions...............

<a href="http://www.flickr.com/photos/40220688@N05/3744625266/" title="PICT0414c by sphil876, on Flickr"><img src="http://farm3.static.flickr.com/2552/3744625266_e2b99284a2.jpg" width="500" height="375" alt="PICT0414c" /></a>
 
I didn't want to start a new post for this but i was wondering if anyone knew of a place that has the meanwell ELN-60-48d power supplies? I've been looking ALL over the place with no luck...

Appreciate the help:)
 
<a href=showthread.php?s=&postid=15392814#post15392814 target=_blank>Originally posted</a> by der_wille_zur_macht
Can you post specs of your setup (tank dimensions, number of LEDs, model and bin of LEDs, drive current, optics, etc.)?
I got them from eBay, but they aren't anything special. I figured that their shear numbers would make up for their short comings. I've been known to be wrong before. :lol: The tank is a 30g with a 10g sump. I have an algae scrubber that also had LEDs but switched to PCs.

White LEDs:
Specifications:
Body material: Thermoplastic
Circuitry board material: Diecast Chrome
225 Super Bright LEDs
Color: WHITE 6000-7000K
Working Voltage: 110V (Plug in To North America Standard Outlet)
Power: 13.8 Watts
Dimensions: 12 ¼ inches (30.5cm) square

Thickness: Low profile 1.25"

Power cord length: 48 inches

Recommended coverage: One panel per 2 square feet for full illumination.


Blue LEDs:
2009 Xen-lux LED
Single Grow Light Panel
Color: All Blue
MSRP $119.99

Output comparable to a 250w HPS system!
Dazzling, extraordinarily-bright 14-watt panel!
100% genuine Bridgelux LEDs!
Latest 2009 technology; sixth-generation design!



Anyway, I have my doubts about them. They have pretty good apparent brightness, but they aren't quite what they were promoted to be. The driver is a small internal circuit board with some resistors, diodes, and two fat inductors. (I'm at a loss why the inductors are there.) (Not much help, sorry.) I have in total 450 5mm LEDs that I was hoping would be some of the new high efficiency bulbs. I haven't measured their output though (looking for an affordable light meter).
 
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<a href=showthread.php?s=&postid=15393038#post15393038 target=_blank>Originally posted</a> by goofyreefer
I didn't want to start a new post for this but i was wondering if anyone knew of a place that has the meanwell ELN-60-48d power supplies? I've been looking ALL over the place with no luck...

Appreciate the help:)

I purchased mine several months ago from Powergatellc.......
Though some people have mentioned that they were not able to purchase them from Powergate.....
http://www.powergatellc.com/product/29/18-150.htm
 
<a href=showthread.php?s=&postid=15393395#post15393395 target=_blank>Originally posted</a> by sphil876p
I purchased mine several months ago from Powergatellc.......
Though some people have mentioned that they were not able to purchase them from Powergate.....
http://www.powergatellc.com/product/29/18-150.htm

Yeah I tried to get them from there but I was told today that they can't sell them to me and suggested a place which didn't even have them.

Kinda frustrating......
 
<a href=showthread.php?s=&postid=15393095#post15393095 target=_blank>Originally posted</a> by CHOMPERS MFK

Anyway, I have my doubts about them. They have pretty good apparent brightness, but they aren't quite what they were promoted to be. The driver is a small internal circuit board with some resistors, diodes, and two fat inductors. (I'm at a loss why the inductors are there.) (Not much help, sorry.) I have in total 450 5mm LEDs that I was hoping would be some of the new high efficiency bulbs. I haven't measured their output though (looking for an affordable light meter).

Your doubts are probably well-founded. Without knowing the model and bin of the actual LED emitter itself, it's hard to trust any information on a pre-assembled product like this. The difference in efficiency between one model of "high brightness" LED and another can be huge (comparing a low-bin Luxeon I to a Luxeon Rebel, for instance - the Rebel is two or three times as efficient), and this means that just knowing the power consumed by an LED array doesn't really tell you anything at all about it's brightness, unless you know the specs of the LEDs used.

Since LEDs are inherently DC devices, the diodes are there to rectify the AC into DC, and the inductors are there to smooth the wave.
 
Thanks for the info. Is the Rebel line the leader in efficiency? Lately I have been looking for replacement LED's. I need to be brought up to speed before I make the purchase. Thanks again.
 
Assuming you are getting the highest bins, Rebels and XR-Es are about the same (both around 90 lumens/watt). Efficiency will vary a bit depending on how you drive them - higher currents means more light in the absolute sense, but less efficiency.

A few months ago, Cree announced a new product (the XP-G LED) that blows either of these away in terms of efficiency and absolute brightness, but they're not available yet. It'll be interesting to see if the price and availability is attractive enough to make them suitable for reef lighting.
 
<a href=showthread.php?s=&postid=15396821#post15396821 target=_blank>Originally posted</a> by der_wille_zur_macht
Assuming you are getting the highest bins, Rebels and XR-Es are about the same (both around 90 lumens/watt). Efficiency will vary a bit depending on how you drive them - higher currents means more light in the absolute sense, but less efficiency.

A few months ago, Cree announced a new product (the XP-G LED) that blows either of these away in terms of efficiency and absolute brightness, but they're not available yet. It'll be interesting to see if the price and availability is attractive enough to make them suitable for reef lighting.

Is it probable that the new XP-G LEDs will be available through the current suppliers we are currently using? Has Cree published an expected release date? Probably not much info available, but I thought I might ask just in case......
 
No release date or information about distribution channels or volume of production. Here is the official press release:

http://www.cree.com/press/press_detail.asp?i=1241094842732

IMHO at this point there's no point in waiting for it, unless you're doing some mammoth build. I'm guessing it'll be expensive and hard to get for us hobbyists for the first few years (as was pretty much the case with any other groundbreaking new LED for the last few years.)

If you want lots of light in a small package, you can use Cree MC-E (basically four XR-E in a single package) or three-up Rebel stars. These options won't be as efficient as they are claiming the XP-G is, but it'll give you a similar lumen density. At any rate, efficiencies of current products (XR-E and Rebel) are such that the payoff is only a few years out, so I'm wondering if we will be at a point of diminishing returns sooner or later.
 
Time to get back to work on the all new clip LED lamp :D

<a href="http://www.flickr.com/photos/40220688@N05/3747758098/" title="PICT0415 by sphil876, on Flickr"><img src="http://farm3.static.flickr.com/2526/3747758098_b3c8bcdbb6.jpg" width="500" height="375" alt="PICT0415" /></a>
 
I have been following a lot of people's DIY LED projects and have seen some good results for their first projects. Has anyone taken PAR readings with their new LED lights to see if they have enough LED's in their builds? Again, great work and I'm considering starting my own for my 75 gallon reef.
 
<a href=showthread.php?s=&postid=15401922#post15401922 target=_blank>Originally posted</a> by wesley6610
I have been following a lot of people's DIY LED projects and have seen some good results for their first projects. Has anyone taken PAR readings with their new LED lights to see if they have enough LED's in their builds? Again, great work and I'm considering starting my own for my 75 gallon reef.

I do not own a light meter, but I believe soundwave posted the par readings on his build in the big LED thread....
HTH :)
 
Clip light is finished....

<a href="http://www.flickr.com/photos/40220688@N05/3750575737/" title="PICT0417a by sphil876, on Flickr"><img src="http://farm3.static.flickr.com/2615/3750575737_717cfcb974.jpg" width="500" height="375" alt="PICT0417a" /></a>

<a href="http://www.flickr.com/photos/40220688@N05/3751367030/" title="PICT0420a by sphil876, on Flickr"><img src="http://farm3.static.flickr.com/2484/3751367030_dbf97ab2a9.jpg" width="500" height="375" alt="PICT0420a" /></a>

Got the sink and LEDs protected and held in the fixture with 1/4" acrylic and two screws drilled and tapped through the outside of the lamp.....

<a href="http://www.flickr.com/photos/40220688@N05/3751367252/" title="PICT0426a by sphil876, on Flickr"><img src="http://farm4.static.flickr.com/3516/3751367252_30ae0c442c.jpg" width="500" height="375" alt="PICT0426a" /></a>

<a href="http://www.flickr.com/photos/40220688@N05/3751367426/" title="PICT0428a by sphil876, on Flickr"><img src="http://farm3.static.flickr.com/2592/3751367426_95fce02213.jpg" width="500" height="375" alt="PICT0428a" /></a>

:D
 
sphil, what current are you driving your spotlight at? Do you have any means to take temperature readings on the heatsink, LEDs, or driver? I'm assuming that black thing on the heatsink is a fan?
 
<a href=showthread.php?s=&postid=15407647#post15407647 target=_blank>Originally posted</a> by wesley6610
Is this your new light for your frag tank?

Dont really have a plan for the clip light... Just had some extra leds and wanted to build something. I thought it would be cool to have a LED spotlight that I could experiment with. Distance from the water, showcase a single coral, live rock vat, and temporary fixture were some of the Ideas I have kicking around for this light.....Oh yea, and because I think LEDs are neat :)
 
After reading your build I have started my parts list for a 75 gallon build and referenced soundwave's thread too. Seems like I'm maxing out around $750 since I want to do around 72 (36 white and 36 royal blue) w/optics so I can keep clams and SPS at the bottom of the tank. Thanks for all of the details and pics, very helpful indeed.
 
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