Luxeon Rebel LEDs

[bascerballer4]

Okay, imagine having 200 Luxeon Rebel LEDs as your aquarium light.

Doesn't sound like a good idea, right?

Well see about that.


LED Facts

It will be produce over 29,000 lumens at a current of only 750 mA. That light output is twice as much lumens as a 150W metal halide lamp. Not only does it produce more lumens, it also produces less heat.

These LEDs do not need a cooling fan like the metal halides because the LEDs have a built in thermal heat sink which absorbs most of the heat produced. An aluminum heat sink may be desired because it will produce better light output and conduct most of the heat made from the LEDs.

Metal halide's color temperature are typically 20,000 kelvin. These LEDs will not produce such color temperature but they still carry good enough source of color temperature to make your corals look its best. The typical color temperature for these LEDs range from 6,500 - 10,000 kelvin. The color these LEDs produces are just as good as most aquarium lamps.

I think these LEDs would be great for an aquarium light. A fixture with these LEDs will leave SOLARIS behind with its dust.

What do you guys think?

Kind regards,


Chingy

 

[erendon]

Can you parogram the color temperature of the LED's to go up 20 K or down 6.5k?

 

[erendon]

How many watts does it imulate?

 

[L98-Z]

<a href=showthread.php?s=&postid=9594467#post9594467 target=_blank>Originally posted</a> by erendon
Can you parogram the color temperature of the LED's to go up 20 K or down 6.5k?

I'm not familar with these LEDs, but LEDs in general are based on their forward drop voltage and the current running through them. For example, a red LED may have a forward drop of 2.1 volts, while a Green LED may have have a 3.5 volt drop. The currents are normally a little different as well, but the color should not change. They do however become dimmer based on current.

 

[L98-Z]

<a href=showthread.php?s=&postid=9594477#post9594477 target=_blank>Originally posted</a> by erendon
How many watts does it imulate?

Does imulate=emulate?

What do you mean by emulate.

According to the Datasheet, again, assuming I'm reading it correctl, says that the cool-white (10k) LED uses 145 mW. That seems a little low since many of their other LEDs are rated by 1, 3 and 5 Watts

That would be appoximately 29 Watts of power with 200 LEDs. You'd still need to regulate the current though.

The LEDs would also last longer, so that'd be a plus as well, the problem is that those LEDs are not cheap by any means. The ones I typically find are almost 6 dollars a piece.

If you could find them in bulk for pretty cheap, it'd probably be worth it.

 

[bascerballer4]

I'm not quite sure but I thought luminousity played the role of having good and healthy coral growth. So would the wattage matter more, or the lumens output?

 

[L98-Z]

<a href=showthread.php?s=&postid=9595558#post9595558 target=_blank>Originally posted</a> by bascerballer4
I'm not quite sure but I thought luminousity played the role of having good and healthy coral growth. So would the wattage matter more, or the lumens output?

I'd imagine it does. It's the strength of the light. Watts is a power unit. Everything that has current flowing through it will dissipate power. The goal is to have low wattage with alot of output. In your typical lightbulb, you sue wattage because with an increase in wattage, you typically see an increase in lumens.

An LED is not the same, they're much more efficient than your typical lightbulb. LEDs are great, they're just expensive. Especially ones that put out alot of power.

 

[L98-Z]

Upon reading a little further into that datasheet, it appears that depending on the voltage drop and amount of current going through the White Rebels, it will change the color temperature. So I guess you could technically program that.

 

[Icefire]

They are almost the same as Luxeon K2 but smaller.

At 4-5$ each leds + driver + heatsink + lens...

 

[hahnmeister]

Whats the lumen/watt rating?

 

[L98-Z]

<a href=showthread.php?s=&postid=9596191#post9596191 target=_blank>Originally posted</a> by hahnmeister
Whats the lumen/watt rating?

"For each CCT range, there are several bins with different minimum performance; 40, 50, 70 and 80 lm at 350 mA for cool- and neutral-white. With a forward voltage of 3.15 V, the highest bin has an efficacy of around 72 lm/W.

At higher drive currents, the datasheet shows that the top bins deliver 145 lm at 700 mA in cool- and neutral-white (57 lm/W), and 110 lm for warm-white (43 lm/W). "

http://www.ledsmagazine.com/news/4/3/28