DIY LEDs - The write-up

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With Rapidleds CWs, they told me before, they dont have control of what BIN they receive from supplier with regards to LEDs.
This means that they don't care about their customers. When I was shopping for CWs I asked several suppliers which bins they had in stock and picked the best one. Of course the pleasure of selecting the exact bin costs $$$.
 
Mike you must be like me and build before we knew/thought about the 1 ohm resistors, but hey congratulations on being the first real life example :),
You mean I should have put a resistor in the string ?
Well, that Noname driver was promising - 20-30W output, dimmable with a pot already installed! So I didn't need an external power supply for this driver.
Maybe this efficiency problem is due to the fact that I run this driver below the "top efficiency band"
 
I would always put in a resistor so I can check the exact string current anytime I want to and with the string hot and running steady state.

What's the name of this 'no-name' driver. Or is there really no label on it anywhere?
 
ok lets try a pic
 

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When they roll out an affordable bulb where you can adjust the exact warmness/coolness, they will probably take over the world.
Available long ago in the shape of RGB bulbs with remote control.

It would be more interesting to see LEDs with narrower angles, so no optics would be required.
 
MosMike are you telling me that while me and the rest of the world has been using compact fluorescents, we have for a long time had the option of picking up an affordable and reasonably bright bulb to put in our table lamps that allows us to adjust the exact warmness/coolness?

Link please. :lol:
 
The LEDs in a tube with fans works well for me. Over my 75g I have 3 tubes of 24 LEDs each. The LEDs are mounted on a 1/8" aluminum bar with Arctic Alumina adhesive, with small black heatsinks on the opposite side of the bar also with adhesive. That slides into the fluorescent tube carriers (from Lowes), with push/pull 12v ducted fans on each end (40mm computer fans). I have one tube with 24 RB XR-Es, and the other two tubes have 12 CW XP-G and 12 RB XR-E each. Plenty of light for my 75g, and wonderful color.

I didn't want the typical 'massive heatsink' approach due to my custom canopy, and I like the ability to just wipe down the plastic tube to remove any salt accumulation. Another benefit of the tube is placement - I have one tube right at the front of the tank angled back slightly, and it illuminates the front sides of my corals way better than the MH did. And after all, the front sides of the corals is what I'm looking at!


Some people have complained that cool white don't give you the ability to render reds and oranges, but maybe that is a difference between the cool white XR-E and the newer XP-G (or just that I got a bin that is slightly warmer).


Any pics of your unit? Your LED unit that is. :D

BTW just spent 2 days going through this thread from beginning to end. My head aches lol.
 
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MosMike are you telling me that while me and the rest of the world has been using compact fluorescents, we have for a long time had the option of picking up an affordable and reasonably bright bulb to put in our table lamps that allows us to adjust the exact warmness/coolness?

Link please. :lol:
http://www.dealextreme.com/p/e27-60...ir-remote-control-light-bulb-ac-85-265v-42285
sku_42285_5.jpg

I use it as a night light in the bedroom :)
Several bulbs can be controlled by 1 remote.
 
That's a 5w bulb that changes colors, totally different idea than an actual lamp bulb replacement.

But hey, looks like fun, I might get one for my car :lol:
 
Led Fixture

Led Fixture

Ok Fishman! I have all the U channels cut :) All i have to do is cut the HS sections to 2" each and smooth the edges. BOY that`s alot of cuttung! lol. If you don`t mind, i have some questions.

I`ve been figuring a new layout for each of the 3 sections over my tank. Each section will have this:
48 LEDS total
36 will be XP-E RB Group 16
8 will be XP-G White,(4 OW R4 bins 3A and 3D), (4NW R3 bins3C and 4B)
4 will be XM-L cool white @1500MA

Now since the XM-Ls will run @ 1500MA for a total of 12 over the entire tank, i`ll have to run them on their own HLG-B driver.

The XP-Gs since thy have a max MA of 1500, i can either drive them at 700MA and run them with the rest of the RBs OR drive them @ 1000MA in which case i`d have to run all 24 over the entire tank with ITs own HLG-B.

Then i`d have to run the 108 RB XP-Es @ 700MA on it`s own HLG-B as well.

SO, that route would leave me with 3 HLG-B drivers, which is good BUT,
do you think it be better to run each of the 3 sections independent of the other,(each with their own sets of drivers)?.

Should i run the XP-Gs and XP-Es all @ 700MA and run them on the same driver?

I`m not to concerned about dimming seperate colors to get an effect. I hope to do that with the ratio i`m working with. I DO however want to sim that sunrise/sunset and lunar cycle in my tank. I also whould like it to be as realistic as possible. My tank already is east/west orientation. What i`d like to see is that gradual fade UP of the LEDS from east/west just like the sun as it progresses throughtout the day as well as the moon.

Now, with the amount and type of LEDS i mentioned above, how would i best be able to do this while haveing the most efficiency?
 
Well for 144 LEDs you could do 12 string of ELN and have dimming at a very fine level, BUT what are you going to drive these with? IMHO East to West may look cool, but the fish and coral won't care - so how often will you be home to see it? I think the driver is the bigger issue.

I think I would drvie the XMLs with and ELN at 1.3 amps. I believe the HLG are $00+, but he LN are $34 or less. Maybe with the lower voltage you might even be able to driver 13-14 with the ELN (note 2 LEDs are cheaper than the driver difference).

XP-G same thng use 2 ELN rather than one HLG.

No if you controller has the output. Maybe do an east to west with the RBs. I believe Typhoon has 4 signals so Whites, East, Central, and West. If you have more control lines then sure use ELN and have finer control.

Another thought would be to use the CAT4101 driver. Since it drives 6 LEDs you would have even finer control. It will also be cheaper than HLG and ELNs.
 
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