Where to buy Luxeon Rebel?

[IndecisiveFlashaholic]

Does anyone know where this type of led can be bought? Also, how does it compare to Cree/Seoul?

 

[PeterScowcroft]

No,

I think it would be near impossible to use on a homemade flash light due to the size.

It is neither as bright as, or as efficient as a cree/seoul.

too little too late from the luxeon camp

 

[Der Wichtel]

It's a site from Germany

www.led-tech.de

 

[IndecisiveFlashaholic]

So if I am looking to upgrade/mod a flashlight of mine, I would be better off using a Seoul or Cree?

 

[sysadmn]

Probably. It's designed for reflow soldering - I haven't heard of anyone being able to hand-solder the heat pad.

 

[DUQ]

Future Electronics is an authorised Lumileds dealer. I have ordered from them a few times. They do add a small fee to the order but nothing substantial.

Future Electronics-Luxeon Rebel

 

[Illum]

right from luxeonstar.com

heres the quick link
http://www.luxeonstar.com/sub_category.php?id=1394&link_str=1394

 

[moon lander]

right from luxeonstar.com

heres the quick link
http://www.luxeonstar.com/sub_category.php?id=1394&link_str=1394

wow they are cheap! i think ill pick up a few to try. anyone have any idea if it is possible to hand solder these? what the heck is reflow?

 

[Illum]

considering the size of the led chip and the solder pads...I dont think I could do it with a steel pin tacked onto an ordinary solder iron tip...I think hot plate soldering would do if anyones into the profession

 

[SemiMan]

Hot plate soldering works just fine....

For those who do not know what that is... just like it sounds.... hot plate around 250C... put the board down and tin the pads, take it off to cool.... put the parts down, then throw it back onto the hot plate.

I have been doing this for SMT prototyping for years... not pretty, but for things like power semis, often the only way of doing it let alone LEDS. It works for Crees and K2s as well.

I have a heat plate for work, but I hear you can get creative in the kitchen. Do a search on the web.... may be able to find something.

Semiman

 

[sysadmn]

Wow! When you use the hot plate, do you use standard SMT solder paste or something else, like a low temp repair paste? Any additional flux before tinning?

FWIW, Here's a reference for hot plate soldering and toaster oven reflow

 

[mds82]

Mouser.com has them as well.

 

[SemiMan]

I looked for them on Mouser but could not find anything. What part number did you find them under?

semiman

 

[glire]

http://www.luxeonstar.com/sub_category.php?id=1394&link_str=1394

That's an interesting link.
I thought that colored LEDs were more efficient than white LEDs. It appears in the specs shown in that link that it's not the case.
White LEDs are basically blue LEDs with a phosphor coating. Shoudln't then the blue LEDs be at least as efficient as white LEDs ?

 

[uk_caver]

White LEDs are basically blue LEDs with a phosphor coating. Shoudln't then the blue LEDs be at least as efficient as white LEDs ?

In one sense they are (converting elecricity to photons), but lumens are related to apparent brightness - the sensitivity of the eye at different wavelengths of light comes into it, and the eye isn't very sensitive to blue light.
The eye is most sensitive to green light (one reason why the green and cyan LEDs have very respectable figures).

As an extreme example, you could theoretically have a super-efficient UV LED that was actually rated at precisely 0 lumens/Watt, since its output was invisible. If you put a phosphor in it that gave off visible light when excited with UV, it could end up with a respectable lumens/watt figure.

 

[SemiMan]

wow they are cheap! i think ill pick up a few to try. anyone have any idea if it is possible to hand solder these? what the heck is reflow?

Even cheaper at Future http://www.futurecb.com/Store/Searc...1301000000&ManufacturerName=LUMILEDS+LIGHTING

It looks that if you click on some of the quantity 1 parts, you get a 2 peice and up price that is lower.

Semiman

 

[evan9162]

$1.99 each for the -50 parts when you order 2 or more.

the -50 parts are 95 lumens typical at 700mA - the same performance of a Lux III U-bin

aside from the assembly difficulty, you can't complain about getting the equivalent of a U-bin Lux III for $2.

 

[moon lander]

$1.99 each for the -50 parts when you order 2 or more.

the -50 parts are 95 lumens typical at 700mA - the same performance of a Lux III U-bin

aside from the assembly difficulty, you can't complain about getting the equivalent of a U-bin Lux III for $2.

any idea what would happen if i tried to solder leads onto these things? with a tiny soldering tip and a steady hand? if not, doesnt someone want to buy a bunch and sell them on cpf pre soldered with leads? or point me in the right direction to learn the hot-plate method?

 

[moon lander]

tried to order from future but their website gets stuck at the export compliance statement. i hit agree and it just reloads the page

 

[chimo]

Just ordered 5 from future.