Testing out some 10W Chinese LEDS - Page 4
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Old 02-16-2012, 07:22 PM   #46
Naekuh
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Quote:
Originally Posted by hcker2000 View Post
It really seems the way to go with these are to run them off a current regulated power. I think now rather than using one 30 watt current regulated power supply I will use three 10 watt regulated power supplies as the cost difference is about $5 and its worth $5 to over come the issue with running LEDs in a series.
no.... if ur gonna run 3, use a meanwell 9-48V constant current and serial 3 of them together for 3 x 12V for a total of 36V, and have the meanwell set the current at 900mA.

U dont need to run 3 different drivers for up to 4 LED's on that single driver.
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Old 02-17-2012, 03:30 AM   #47
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this is a pretty interesting thread!

I was just about to pull the gun on a diy Cree set up for my 20g and now I'm starting to reconsider. Im a complete noob when it comes to LEDs, any lighting for that matter lol.

Since this route is cost pretty much nothing, I want to try this out for a bit to see if it works.

what do you guys think of this?

http://www. ebay .com /itm/10W-White-High-Power-1000Lm-LED-Lamp-Waterproof-driver-/220908727356?pt=LH_DefaultDomain_0&hash=item336f2f ac3c (remove the spaces)

Is it possible to add a dimmer to this set up? would I need more light for a 20g? Sorry for all the questions, really trying to learn more about LEDs =D
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Old 02-22-2012, 09:04 PM   #48
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Originally Posted by Naekuh View Post
no.... if ur gonna run 3, use a meanwell 9-48V constant current and serial 3 of them together for 3 x 12V for a total of 36V, and have the meanwell set the current at 900mA.

U dont need to run 3 different drivers for up to 4 LED's on that single driver.
I went with three drivers as thats going to give me the most flexibility and I'm guessing the three drivers I purchased don't cost any where close to meanwell.

With the 3 drivers I'm free to turn each led on and off. I can still dim them all if I wish granted it will be more of a pain in the butt.

The best part is if one of my leds go out I dont have to worry about the others going off as there not in series.
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Old 02-25-2012, 06:43 AM   #49
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im pretty keen to do a similar set up over my 120 but more of a low tech set up

i would like to use 2x or 3x of the 20w led's the less leds the better ( i dont plan on using optics and this is for my discus tank) im basically chasing a second opinion as i think 2 or 3 should work really well im gunna give a single 50 watt chinese led a go over my 60g cube which is going to be more a high tech set up( im collecting bits and pices for this set up atm)

but i have been doing a bit of research and so far i think im going to be pretty spot on maybe using 10 wat emiters would create a better spread and i could always add a random red and blue in there somewhere oh and my 120 is 4x2x2feet if tht helps????






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Old 02-27-2012, 05:41 PM   #50
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The viewing angle on the square leds are about 160 degrees which is wide. The only 20watt+ leds I have seen are the square ones.

I'm sure some one is going to bring up PAR after I mention this but my guess for your 120 gallon tank would be six 20watt leds.

I think that would be the most flexible way to get good coverage. Also seeing as how the tank is 2 feet deep to get good penetration to the bottom you might need a reflector.

See these links.

Reflector one
Reflector two

Also for any one else who comes to this thread here are the parts I ordered for my 29 gallon.

3 X 10 Watt Led
3 X 10 Watt Driver
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Old 02-28-2012, 04:33 AM   #51
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Over discus you might consider the Citizen 5000k LEDs; they are astonishingly cheap, and are 85 CRI. I paid $9.53 ea for the 30w version. There's a 60 watt model for $16 (80 CRI / 5000k) and these came from a US supplier. Reflectors (60 deg) cost me $1.50 ea. I can give you part numbers if you're interested.
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Old 02-28-2012, 08:56 PM   #52
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Over discus you might consider the Citizen 5000k LEDs; they are astonishingly cheap, and are 85 CRI. I paid $9.53 ea for the 30w version. There's a 60 watt model for $16 (80 CRI / 5000k) and these came from a US supplier. Reflectors (60 deg) cost me $1.50 ea. I can give you part numbers if you're interested.
If you have links for those leds I would love to check them out as ordering from over sea's is slow.
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Old 02-29-2012, 03:07 AM   #53
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Sure do - http://avnetexpress.avnet.com/store/...1&listIndex=-1

The reflector is "tyra3-ww" (just search it on that site).

The 60w emitter is "CLL030-1212A1-503M1A2" (it says 40w but that is nominal). If you search for "CLL030" it will show all the varieties. There's also a CLL-040 (the 96w is $26) series but the reflectors are hard to find and ledil doesn't make a 60 deg or wider version.
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Old 02-29-2012, 06:22 PM   #54
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Interesting I don't see any higher than 5k color temp though.
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Old 03-02-2012, 02:11 PM   #55
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hhhmmm 6 20watts on a low tech sounds like alot for more spread i would use 10w emmiters

i started a thread on simply discus and there all a bit discouraging on there haha oh well il be the one laughing when iv only spent half compered to them

cheers for the imput for the 120 il probably try 4 to begin with i think i can always add more later and i have meterial for a reflector already if i need it


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Old 03-02-2012, 03:34 PM   #56
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Quote:
Originally Posted by dbosman@msu.edu View Post
AC goes to the two wires of the same color, on the left. The tilde indicates AC.
The wires on the right side are + and -.
Those go to the + side of the LED and the - side of the LED.
We're fortunate that the wire color is actually correct.

Of course, I've had prior experience guessing.
I got a bag of drivers with pink, brown, and white leads once. That was interesting.
Going on the labelling for that "driver".

Its a 12v DC power supply. There isn't anything special about them and its hardly "a driver".
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Old 03-04-2012, 12:30 AM   #57
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OK so I got my 10 watt constant current driver and 10 watt led in the mail today! Just to clarify....I run the + and - led to the red and black of the driver. Then wire the other end of the driver to, say a standard cheapo extension cord?
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Old 03-05-2012, 02:36 PM   #58
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I'm using 5 of these 1000ma 10-12v LED's, in parallel, with a constant voltage power source, and heatsinks. These are amazingly bright. Do you know what temp they need to be kept at to prevent thermal runaway? Right now I'm using PWM @ about 80% and huge heat sinks because I'm worried about the heat.
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Old 03-05-2012, 02:51 PM   #59
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OK so I got my 10 watt constant current driver and 10 watt led in the mail today! Just to clarify....I run the + and - led to the red and black of the driver. Then wire the other end of the driver to, say a standard cheapo extension cord?

Usually black is ground/negative and hot is positive/hot, that runs to the LED. Depending on the driver you might be able to wire with and old PC cable or extention cord and plug it into the wall. But I've send a few that need something between the wall and driver for the AC-DC conversion. Do you have link for the driver specs?
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Old 03-05-2012, 03:06 PM   #60
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Usually black is ground/negative and hot is positive/hot, that runs to the LED. Depending on the driver you might be able to wire with and old PC cable or extention cord and plug it into the wall. But I've send a few that need something between the wall and driver for the AC-DC conversion. Do you have link for the driver specs?
Yes! - http://www.dealextreme.com/p/330ma-1...-90-265v-81781
The bad part is last night I realized I ordered the wrong driver for this led. - http://www.dealextreme.com/p/10w-850...e-10-11v-80022

Noob mistake I guess lol. So I ordered the correct one off of fleabay after I figured that out. I'd link the new one but I know I can't.
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