Brown LED?

LEDBE
3000k

3000k

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I had a dream and in the dream I had a small 1AA size flashlight that had a brownish beam similar to a dying Incan but much much brighter. The color looked so pleasing and easy on the eyes, It had a small hot spot but had very good throw, I would guess that it was about 200 lumens.

Does any such light exist or can be made? I would go with a comparable size lion cell to get the brightness.
 
The only thing that comes to my mind would be a Quark Turbo AA-2 on an 1 x AA body.

That beam is like an incan, but perhaps not y dying one, the hotspot is somewhat small for an XP-G and with a 14500 you get about 200 Lumen. The lights looks weird, a large Turbo head on an AA body, but a normal Quark head is floodier, not what you're after.

One problem though : As it seems the warm Turbos are sold out at 4Sevens... :sigh:
 
found this on an internet blog:
Brown is a low intensity yellow-green, meaning you have to combine green light and yellow lights at low intensities to produce brown, this is probable the reason why there are no brown leds in the market, a very low intensity green led with a coating to produce some yellow will probably work but the amount of light produced would have to be very very low.
 
Brown light is deep / dim by nature of its wavelength, making it brighter is going to make it less brown.
 
3000k said:
I had a dream and in the dream I had a small 1AA size flashlight that had a brownish beam similar to a dying Incan but much much brighter. The color looked so pleasing and easy on the eyes, It had a small hot spot but had very good throw, I would guess that it was about 200 lumens.

Does any such light exist or can be made? I would go with a comparable size lion cell to get the brightness.
Click to expand...
4sevens Quark MiNi AA WARMS running off a 14500.
Make sure you get the warm and not the neutral or cool version.
The Quark MiNis are not designed to support Li-ions so use an Eneloop when you do not absolutely need 200 lumens.
My Quark MiNi AA WARMS has a tint very close to a 25W household light bulb.

EDIT
Reviews with beamshots.
http://www.candlepowerforums.com/vb/showthread.php?t=277090
http://www.candlepowerforums.com/vb/showthread.php?t=275751
http://www.candlepowerforums.com/vb/showthread.php?t=274113
 
Last edited:
Stillphoto said:
Brown light is deep / dim by nature of its wavelength, making it brighter is going to make it less brown.
Click to expand...

Not exactly, brown is brown as a result of both wavelength and relative intensity/saturation. http://en.wikipedia.org/wiki/Brown

"Bright brown" light would actually be red, orange or yellow as brown is really one of these colours at a low intensity; an incan bulb on low voltage produces red/orange light so this sounds like a match for the light in your dream.
 
Thanks for the help. So are the lenses of the quarks removable? Would replacing the lens with one close to a beer bottle tint help or would it kill all the output?
 
The lenses are removable if you can crack open the head, which is sealed with Loctite. You must boil the head and use the right tools to be able to open it without damage.

As for a colored lens, I have no idea how you would make one that fits, it surely would kill the output. In hat case you're better off with a P60 host, where you can install more powerfull LEDs, but feeding those with a single 14500 will be a problem of course...
 
Some Quarks come in cool, neutral and WARMS. If you get the WARMS you do not need to replace the lens with a piece of glass cut from a beer bottle. Look at the beamshot pictures of the links in my last post and you can see the tint of the WARMS version is brown.

All the beamshots in the links is comparing the WARMS to cool or neutral LEDs. I took a picture of an incandescent 2C Mag against my Preon WARMS some time ago and you can see the Preon has a very similar tint to the incan and beats it in brightness by a great margin. The Quark Mini AA WARMS is made with the same lot of LEDs as the Preon WARMS and have the same tint.
Tint comparison Mag 2C incan left Preon 2 WARMS High right.
Tint-Mag-Preon-Hi.jpg

The Quark MiNi on 14500 (4.2-3.6V) will be brighter than Preon 2 on 2*NiMH (2.7-2.4V).

There are almost a dozen different models of Quark AA and Quark MiNi AA with some 4 different tints.
Running a full size Quark AA with a 14500 will bump you from 109 to 206 lumens (cool white). 78 to 148 (warm white).
Running a Quark MiNi with a 14500 will bump you from 90 to 300 lumens (cool white). 65 to 200 (warm white).
This is because the big Quarks regulate the output from a 14500 while the MiNi let a 14500 go direct drive.

The WARMS 4sevens lights use 7A or 7B tint LEDs which are ~3250°K.
CreeXR-ENeutral-WarmWhite.jpg


It makes much more sense than using a WC/ANSI 1 tint cool white and shining it through a beer bottle.
ANSIcoolwhitecolour.jpg
 
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It is not possible to make "brown" colored light. Brown is actually a de-saturated yellowish-orange color.
 
For what it's worth, I bought a used P6 on eBay a month or so ago. It came with a P60 drop in that was a couple hundred lumens.......(by guess and memory).......and very brown in tint. I replaced it with another drop in and wrote brown on the module. No marking on the unit, but have never seen a tint even close to that.
 
Anders Hoveland said:
It is not possible to make "brown" colored light. Brown is actually a de-saturated yellowish-orange color.
Click to expand...
The very fact that you can have an area on TV/computer screen lighting up that is perceived as "brown", suggests otherwise. :)

Just for fun, I fired up a small "color picker" proggie. You get brown for relatively low Red values, with about 1/3-1/2 Green mixed in, and Blue component pinned at 0. I think the key here is "low intensity". So it may be possible to make a light that is perceived as "brown", by mixing low-intensity light from a red LED, with even less light from a green LED. But then as you crank up the output (keeping relative output constant?), the perceived color would change to brownish red -> dark red -> orange -> reddish yellow -> yellow.
 
RetroTechie said:
The very fact that you can have an area on TV/computer screen lighting up that is perceived as "brown", suggests otherwise. :)

Just for fun, I fired up a small "color picker" proggie. You get brown for relatively low Red values, with about 1/3-1/2 Green mixed in, and Blue component pinned at 0. I think the key here is "low intensity". So it may be possible to make a light that is perceived as "brown", by mixing low-intensity light from a red LED, with even less light from a green LED. But then as you crank up the output (keeping relative output constant?), the perceived color would change to brownish red -> dark red -> orange -> reddish yellow -> yellow.
Click to expand...

Yes, brown light is just a dim yellow light. You can't really have a bright brown light, because then it would look yellow. A very warm white LED, something about 2500K in colour tint, is probably what the OP is after. Keep it low enough, or far enough away, and it will cast a nice brown light. A floody beam profile will help keep the lux low enough to look brown.

The bad news is that not many companies produce flashlights with warm white LEDs. Neutral white is easy enough to find, but it won't give you a brown (or yellow) light. Nor will cool white, of course.
 
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