Luxeon Rebel LEDs - Underrated performers

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chesterqw
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i hope someone finds some luxeon TX to play with too.
the low vf is really awesome.
maximum of 1.5A at 85C
they are around the size of the xp-g

Fritz t. Cat
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I see that some flowers are deep red color, and that they are darker in white light than those that are medium red color.
With white light, these flowers are white at the tips of the petals and then red shading darker near the center.

With a Philips Luxeon deep red led, they are uniform light shaded.

Apparently the dye they use is dark only because our eyes are insensitive to deep red. Red colored artificial objects look equally light under the deep red light, but they look much brighter in white lite. I have noticed this with other flowers, but the white tips show how little this dark looking dye absorbs deep red light. Bees probably see this as a bright color, without the aid of a flashlight.
Another example is red wine. A glass of half wine and half water looks almost black under white light and almost clear with deep red.
I also have a lime led. Colors look sort of normal under it. There is red and blue but there is no purple. If there is also some white light, the lime led shadows look purple.
Flowers, so far, are the best objects to test color rendering.

Flashlight designers should look at lighthouses and pottery.
这些谁设计的手电筒应该看灯塔,以及在陶器。

hank
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Luxeonstar now offers the Rebels in colors on Sinkpad2 bases
http://www.luxeonstar.com/sinkpad-10mm-square-leds
http://www.luxeonstar.com/sinkpad-20mm-star-leds
and other variations

Canadian source, $100 required to get free shipping, so those real good at soldering tiny things will have better options (grin).

I bought several colors on their 10mm square bases — easily centered, on the few solid-pill AA lights I’ve been lottery-lucky to get.

If you contact them, urge a discount for flashlight modders; I’ve swapped emails with some folks there and pointed them to BLF/CPF, so maybe they will look in.

Cereal_killer
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From the prices I’ve seen on the emitters alone those actually seem like pretty good prices (depending on shipping) for the emitter and sinkPAD.

Are there any current rebel sinkPAD vendors? What are they going for alone? I have one Al I’ve been saving (do they even come in Cu)?

Edit: they sell them for cheap

 RIP  SPC Joey Riley, KIA 11/24/14. Now I am become death, the destroyer of worlds.

Fritz t. Cat
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It would probably work better for me to get the SinkPADs separately, because, unlike XM-Ls, they don’t survive my working on the star they are on. Where can one get SinkPADs or other direct thermal stars that fit Luxeons?

Flashlight designers should look at lighthouses and pottery.
这些谁设计的手电筒应该看灯塔,以及在陶器。

djozz
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A nice source for rebel leds plus sinkpad! thanks for sharing, Hank!

hank
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Now, everybody, email their contact, say you read about them here, and hey, they could really get some creative designing done with their products, encouragement all ‘round. Maybe they’d consider a BLF/CPF discount, or a one time special buy, or some cooperative effort — their designers ought to be here already (maybe they are?)

I’d bet the 10mm square boards would also make a nice array on a linear or square substrate, allowing whole new shapes.

Anyone tried using a half-cylinder lens over a strip of emitters, say? “
“Cylindrical lenses … focus light along one axis …. They are used in transforming a point into a line or vice verse.”
http://www.creatoroptics.com/E-L4_P.htm
The vice versa would be interesting — hmmm, a line of 10mm squares with their output focused into a single point might add up to bright?
And flip then lens away for flood, of course …

Fritz t. Cat
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A cylindrical lens focuses only in one axis. In the direction of the cylinder axis the light would spread out like from bare leds, so the result would be a line of light.
Seems to me a hexagonal MCPCB would be more useful.

Flashlight designers should look at lighthouses and pottery.
这些谁设计的手电筒应该看灯塔,以及在陶器。

hank
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I got early samples of the Sinkpad2s because I asked if they might have Sinkpads some day — they were delighted to say “why yes and very soon” — so I’d bet they will be responsive to questions about buying the bases. They have listed their older bases for sale bare, all along: http://www.luxeonstar.com/rebel-led-mounting-bases and they do say, everywhere, ask if you don’t see what you want.

Fritz t. Cat
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Thanks.

Flashlight designers should look at lighthouses and pottery.
这些谁设计的手电筒应该看灯塔,以及在陶器。

Cereal_killer
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 RIP  SPC Joey Riley, KIA 11/24/14. Now I am become death, the destroyer of worlds.

rollinstone157
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Hopback
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Polymer optics and kahtod do optics to suit, they are listed further down the page you linked to.

I preferred the polymer optics offerings. For beam shots do a search on mtbr forums ‘bikelights diy’ should find what you are after.

Fritz t. Cat
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Here is an article about PC amber outdoor lighting, to replace high and low pressure sodium lights. Less lumens per watt than cool white, but less environmental impact (light pollution).
Added: http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&ved=0CDsQ...

Flashlight designers should look at lighthouses and pottery.
这些谁设计的手电筒应该看灯塔,以及在陶器。

Fritz t. Cat
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I now have a deep red, a lime and a PC amber in 18650 zoomies and another deep red in an SS-5049 2 x AAA light.
Wonder where they got “PC”.

Flashlight designers should look at lighthouses and pottery.
这些谁设计的手电筒应该看灯塔,以及在陶器。

hank
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Fritz t., can you try that link again? I’d like to see that article you mentioned.

(My city — despite more than a year trying to educate them about this — is installing very blue-white LEDs, and claiming they’re following dark sky guidelines; I don’t know if they’re lying intentionally, or trusted and got fooled by a clever salesdroid.
I know the broad spectrum of the ‘white’ emitters scatters more, and is worse for astronomy, than the filterable narrow spikes from sodium vapor amber lights.)

—————————-
Where they got “PC” —

LUXEON® Rebel Phosphor-Converted (PC) ….

It’s a blue emitter, with each color type coated with a phosphor designed to emit that one specific band/color

(rather than with several phosphors selected to cover the spectrum and give ‘cool’ or ‘warm’ ‘white’

Fritz t. Cat
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Sorry, I failed to copy the link when I made the post and I can’t find it now. It was about the Canary Islands, but mentioned regulations in other places.

Flashlight designers should look at lighthouses and pottery.
这些谁设计的手电筒应该看灯塔,以及在陶器。

hank
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Fritz t. Cat
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I found it (“Rationale for the future change to led technology for outdoor light in La Palma”): http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&ved=0CDsQ...
This short article explains the choice of PC Amber LEDs to replace sodium vapor arc lights in outdoor lighting.

Flashlight designers should look at lighthouses and pottery.
这些谁设计的手电筒应该看灯塔,以及在陶器。

djozz
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That was fun reading, I like non-regular information like this. Smile

Fritz t. Cat
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I put my PC Amber in a Light similar to a Yezl t9, with four 7135s. To deal with the hollow pill, I filed the tails side of a 1960 penny flat and then filed the outside till it is a slight interference fit in the pill and filed notches for the wires, then epoxied it to the back of the star, using the pill to locate them. I used a lot of of non-silicone heat sink compound. It is not as bright as my Lime one, probably because green light has more lumens per watt than yellow does.

Flashlight designers should look at lighthouses and pottery.
这些谁设计的手电筒应该看灯塔,以及在陶器。

Cereal_killer
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Guys, I’m looking for the 3 color rebel’s that will give the widest wavelength. I’m thinking for sure Red-orange and Lime, what blue spectrum emitter is the best, plain blue, Royal blue or another?

I want to make white light that looks the most true possible without a dedicated white emitter / die, This will be in an S10 with Dr jones FW and a KL driver, should be a surprisingly cheap build (I did get the host for $25).

 RIP  SPC Joey Riley, KIA 11/24/14. Now I am become death, the destroyer of worlds.

Fritz t. Cat
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PC amber might give a flatter spectrum than red-orange and should still come out white with lime and blue. Not sure which blue would be better. Royal blue to be able to see things that are really royal blue colored if the lime fills in the greenish side of blue, or plain blue if that would leave too big a gap.

Flashlight designers should look at lighthouses and pottery.
这些谁设计的手电筒应该看灯塔,以及在陶器。

Cereal_killer
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I have actually never used a “blue” emitter, in all my RGB builds (and a few blue only, all using Cree’s) I’ve always used royal blue for the near-UV qualities (making stuff glow).

I considered Amber, I wish I could fit a quad optic, but I absolutely need the real red. If lime wasnt so good I would think about red-orange, cyan and royal blue but I really want the two [red-orange and lime].

Whats the max driver current on a sinkpad? I’m thinking I’ll drive them around 500-700mA each unless thats the max, then maybe only 350mA each.

 RIP  SPC Joey Riley, KIA 11/24/14. Now I am become death, the destroyer of worlds.

djozz
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Cereal_killer wrote:
Guys, I'm looking for the 3 color rebel's that will give the widest wavelength. I'm thinking for sure Red-orange and Lime, what blue spectrum emitter is the best, plain blue, Royal blue or another? I want to make white light that looks the most true possible without a dedicated white emitter / die, This will be in an S10 with Dr jones FW and a KL driver, should be a surprisingly cheap build (I did get the host for $25).

I don't think it matters much which blue you choose, there's some nice info on colour mixing in this Philips video (btw clearly promoting their lime led):

http://m.youtube.com/watch?v=BpUMcZTyorY

Another philips video I found even more interesting is how to combine a cool white led with a lime led and a red led to mix white light with a whole range of colour temperatures and high CRI:

http://m.youtube.com/watch?v=fYptNm8FVT0

If you build that into a flashlight and design the correct (very fancy) firmware for it, you can adjust the light to all colour temperatures white light in high CRI.

BTW, fish tank lovers are way ahead of us in colour mixing. One example, just follow this discussion Surprised:

http://www.reefcentral.com/forums/showthread.php?t=2408305

It may not be a good source for you (EU-based) but I recently bought some colour leds here, and guess what: they aim at aquarium lovers:

http://www.domeanima.pt/index.php/hp-leds.html

Cheers

hank
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Combinations: some clues here:
https://www.google.com/search?q=pc+color+rebel+spectra+combination

The fishtank/reeftank folks are really into this.

Hmmm, anyone thought of a triple with three little thumbwheel/rheostat “volume” controls, one for each emitter?

Align the wheels along the length of the light, up against the head … heck, there are even ‘clickable’ wheels that have a clicky switch, like a middle-button for clicking/scrolling on a computer mouse.

There’s probably a touchscreen equivalent by now, or a way to do all the adjustments with a “joystick” button ….

I like the directions y’all are going with these.

djozz
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hank wrote:
I like the directions y'all are going with these.

I like it too, and I'm really pleased that CK is developing so many new things with colour leds. With the time, space and means that I have for this hobby there's no way I could even start doing the things that he does.

Fritz t. Cat
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Mine are drawing 1.6 amps. in PC Amber, and about 1 amp. each in Lime and Deep Red. I don’t think that is pushing them hard. They are not on direct stars, as I don’t know where to get ones that fit. One has a flattened old penny behind the star, because it has a hollow pill. Did you find Sinkpads that fit or are you modifying them?

Flashlight designers should look at lighthouses and pottery.
这些谁设计的手电筒应该看灯塔,以及在陶器。

djozz
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Fritz t. Cat wrote:
Mine are drawing 1.6 amps. in PC Amber, and about 1 amp. each in Lime and Deep Red. I don't think that is pushing them hard. They are not on direct stars, as I don't know where to get ones that fit. One has a flattened old penny behind the star, because it has a hollow pill. Did you find Sinkpads that fit or are you modifying them?

I have a lime Rebel and a Sinkpad for it, is there any interest in an output test?

BTW Fritz, in case you are interested, vestureofblood has recently obtained a batch of Rebel Sinkpads, I'm sure he has some left. And if he is out of them, I'd be happy to send you one or two of mine.

hank
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I’m not sure how different the “Sinkpad” is from the “Sinkpad 2”
http://www.sinkpad.com/

And there’s “Rebel” (single color) and “PC Rebel” (color phosphor, brighter and broader emission)

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