View Full Version : LED lighting


jusney
09-07-2009, 10:54 AM
I did a search but nothing turned up that I could use. Is there anyone here using LED lighting as the only source of lighting a nano or pico tank?

Helping a friend do some research on a tank he is building.

Thank you,
Mark

C3gear
09-07-2009, 12:15 PM
Check nanoreef.com there is a ton of write ups and info on LED's

jusney
09-07-2009, 1:19 PM
What's up C3, I did check nanoreef.com and foung some usefull tips. The only problem is I am a visual person and wanted to find someone local and see the setup myself. Lets see if anyone here has tried it.

Acroholic
09-07-2009, 2:32 PM
I am using a Current USA Powerbrite LED strip to light the refugium of my 60 gallon reef. These are available in 10K, actinic, and half 10K/half actinc. I wouldn't think there'd be an issue using these to light a pico or nano, a long as it is not too big. they are very bright, and many people use these to supplement light in their larger reef setups.

jusney
09-07-2009, 4:25 PM
My challenge with these are they are too long. That's why we were looking to build a setup that fits our application. So I guess I am looking for someone who has built their own seup so I can see it in person. We are looking at ready built kits as well and like the R2 blue kit but it's not available with white LEDs. So we'll see.

Skriz
09-07-2009, 6:23 PM
My nano-build thread has a link to some led lighting. I didn't use it, but wish I would've tried it. Not that this helps you "see" anything.

Acroholic
09-07-2009, 6:51 PM
My challenge with these are they are too long. That's why we were looking to build a setup that fits our application. So I guess I am looking for someone who has built their own seup so I can see it in person. We are looking at ready built kits as well and like the R2 blue kit but it's not available with white LEDs. So we'll see.

I use the R2 Extremes for moonlights on all my tanks. Love 'em.
Dave

jusney
09-07-2009, 8:15 PM
Thanks Skriz. Does anyone know if the R2 is available in white?

Thank you

LegalReefer
09-11-2009, 6:33 PM
Chris at Einstein uses them, and I believe can sell them.

Stevhan
09-11-2009, 7:23 PM
Its not a nano but my 140 is completely ran by LEDs. Your more than welcome to take a look at it if you wanted to see light spread and such.

jusney
09-17-2009, 5:40 PM
Been away for a while, time to catch up. Stevhav, I have seen actual tanks with LED lighting and that's why I want this type of lighting. It is the actual wiring and hook up that I am interested in seeing done. The systems that I have seen were somewhat sealed systems and I am interested in like a retro system.

Thank you for the offer.
Mark

Stevhan
09-17-2009, 6:09 PM
Ive taken a few of the solaris lights apart and they arent too complicated. If your good at soldering you should be able to make a decent retrofit. The biggest thing that I remember through the design part was when they were trying to get the light spread in the clusters to work for them. They made several series of the solaris and they all seemed to work fine. The power supplies I think were thier biggest faults...get that down and you should be good.

jusney
09-18-2009, 7:39 PM
Thank you, I am coming up with a parts list and go from there.
mark

djkermitthefrog
10-02-2009, 2:29 AM
i have custom leds on my tank , that i built , i have pink on my girls tank , and blue and black light on my tank. But you are talking about using 100 or so leds.. that is a whole lot of soldering..

misu
10-02-2009, 5:26 AM
just ordered some CREE LEDs from nanotuners to build a small retrofit for a nano, I'll keep you updated


misu

ares
10-02-2009, 10:34 AM
The trick for large scale LED builds is a proper infrastructure. When your talking about 100+ LEDs, hundreds of watts, and a whole lot of heat, you cant really just glue them to some metal and wire it with some 18gauge wire. I think the nano guys found a small PCB layout that works fairly well for it, but for a large scale, you would be paying way too much.

there was a guy on RC that went pretty crazy with it(he was in the electrical industry with access to materials, and I believe he said he built it as a prototype for another company, never heard anything more from this though), he has a metal core PCB that doubled as a heatsink for the LEDs, but he said that PCB would have been a couple grand by itself. then you get into the drivers, which are generally not designed for large scale applications, leaving you to either design your own, or buy a ton of them to each run a few of the LEDs. He said that if he were on his own, his design would have cost ~$5000. I think he said he was putting about 400par at 24" in a 240g tank and he said he would use fewer LEDs next time. dont quote me on that.

all in all, the LEDs are the cheapest simpliest part of the whole thing.

and of course the real sticking point, controlling it. coolest part of LEDs is dimming certain LEDs to get the brightness and color you want, and that gets real tricky(or impossible) for a DIY. nano guys probably care less about this stuff, but again, large scale youd be interested in this.

jusney
10-02-2009, 12:04 PM
Looking forward to it. I did find some MR11 CREE LEDs and am trying them to see how much light (lumens) they produce and if they will be able to keep zoas alive and more importantly grow them.

Keep me posted

ares
10-02-2009, 12:32 PM
they put out about 80lumens/watt, most of them being around 3watts at full bore.

250w MH in the 14k spectrum puts out around 15000lumens, ~60lumens/watt.

as a result, you need approx 30 white LEDs per foot of tank to compare to a 250w MH setup(presuming you put 1 250mh per 2' of tank) and blues put out about half the output, so a ideal scenario would be 15 white and 30 blue per foot.

just to help you with the math.

obviously you wouldnt put a 250w MH on a nano tank :p (or would you...) so adjust accordingly lol.

savingnemo754
10-02-2009, 12:50 PM
I may have missed it but what tank is this for? Nanotuners just released their new LED lids for most popular nanos. They seem to be very nice and they make bang up stuff. I have their 3.18 mod for my 14 gal biocube it work great and was very easy to install.

weaglereefer
10-04-2009, 2:58 PM
they put out about 80lumens/watt, most of them being around 3watts at full bore.

250w MH in the 14k spectrum puts out around 15000lumens, ~60lumens/watt.

as a result, you need approx 30 white LEDs per foot of tank to compare to a 250w MH setup(presuming you put 1 250mh per 2' of tank) and blues put out about half the output, so a ideal scenario would be 15 white and 30 blue per foot.

just to help you with the math.

obviously you wouldnt put a 250w MH on a nano tank :p (or would you...) so adjust accordingly lol.


Wow! That's a lot of LEDs to equal the 250w MH.

What about the plasma bulbs that were mentioned here a few months ago, any news on them?

So say for a 70W on a Pico, you'd need 1/4 the LEDs, figure 4 white and 8 blue. That doesn't seem like it'd be near as bad and could easily handle a small tank. How many LEDs do the Buck Pucks drive?

grouper therapy
10-04-2009, 3:58 PM
The output of a particular led are directly related to how hard you drive them. When choosing a led make sure the lumen per watt stated is based on the same as the ones you are comparing. The life expectancy of a led is shortened the higher you drive them as well. When figuring the amount needed base your calculations on 750ma instead of 1000ma.Cree xp-g are expected out this fall and will produce 139 lumen per watt at 350ma!! They will produce 345 lumen per watt at 1000ma! That is around 35% more than the brightest available now. Keep in mind your heat sink needs with the leds as well since keeping them cool is the secret to their longevity. The optics are something else that requires some research as well.

ares
10-04-2009, 4:19 PM
Wow! That's a lot of LEDs to equal the 250w MH.

What about the plasma bulbs that were mentioned here a few months ago, any news on them?

So say for a 70W on a Pico, you'd need 1/4 the LEDs, figure 4 white and 8 blue. That doesn't seem like it'd be near as bad and could easily handle a small tank. How many LEDs do the Buck Pucks drive?

sorta... thats all per foot, and a MH does 2 feet, so double it to match the intensity, your using all of that 70w MH on the pico, so gotta go apples to apples.

a 70w MH should put out something around 4000lumens, about 18 white, or maybe 10 white and 10-15 blue. the pucks vary, but most do 3-6.

misu
10-05-2009, 7:24 AM
this is what I got from nanotuners, 3 white and 3 blue plus the controller pictured that they said it can drive 6 leds.

should I wire all six in serial or make 2 serial strings of 3 each that are hooked in parallel? can't find voltage specs on the leds.

I plan on mounting them on that processor cooler and use the fan only if needed

objections? :)

misu
10-05-2009, 7:28 AM
nm my last questions, I just checked and they posted the tech specs. I'll wire all 6 in series and it looks like they'll put out more lumens if I drive them at 700mA
White Cree Q5 XR-E Star Features: 107 lm @ 350mA
1000mA - Max Drive Current
3.3Vf - Typ. Forward Voltage @ 350mA
6500K - Color Temperature
Lambertian Radiation Pattern

AugustaSalty
10-05-2009, 8:19 AM
--------------- <--- that is the level this information on


--------------- <---- that is my level there

grouper therapy
10-05-2009, 8:24 AM
Come on man no guts no glory bump then on up to 1000mA! j/k

ares
10-05-2009, 8:39 AM
lol yeah the driver should put them at 700mA, thats its job. should work fine on that heatsink if you have any passive air flow in the area.

misu
10-05-2009, 8:57 AM
If someone else wants to try this just found them even cheaper here:

http://www.dealextreme.com/details.dx/sku.2394

misu
10-12-2009, 1:30 PM
I finally put it together yesterday, that thing is bright even with only 6 leds. Can't really compare it with the stock 150MH but two of these small things may get really close.

I had to add the cooler fan, it was getting almost too hot to touch in 30 minutes or so. Oh and those stars are a pain to solder or I need better tools.

with that said when that stock MH bulb is done I'm thinking about a retrofit