3mm LEDs in Yellow Over 10,000 mcds

Any dye or other visible light filter you apply to a white LED will just reduce your light output. A quick check of 3mm yellow LED tells me that Multicomp makes a yellow 5cd @ 20mA DC. Depending on your application you might be able to pulse this to a higher luminosity.

Good Luck

You've left out part of the equation....viewing angle....The desired amount of light might be achieved with a wider viewing angle...

I don't think those guys are correct.

http://www.ledssuperbright.com/100-3mm-yellow-leds-p-33

http://www.superbrightleds.com/moreinfo/component-leds/yellow-3mm-led-14-degree-viewing-angle-5000-mcd/312/

google does wonders

good points. as usual the limited information about intended usage is "a project"

Mouser and Digi-key have them in red and green, see if they've got them in bi-color, if so, buy a few for tests, turn both color LEDs at once and voila !

Regards

When I was buying LED's my supplier was named Stanley and they had a super quality product. I know times have changed from the late 80's but see if they are still in business, I think they were out of Japan or that is where the LED's were manufactured.

The 80's?

cacaca cool man....

Yeh the 80's dude-man- I was too busy manufacturing truck accessories to get involved in the times also had a miserable missus and kids. We were making lights for the running boards that I manufactured and the Stanley Hi Super Bright is what they were called. I do not know anything of the Luminums or MCDS but they were bright however not any where as bright as the items available today. Also at that time they could not produce a clear LED since they could not produce the full colour spectrum, and blue was not available. Red, Amber, Green were the main colours in available technology. We had fun and made some money.

I use super brights regularly because the end user needs to see them in full sunlight.

We need red, green and yellow.

We are instead using red, green and white.

If you find yellow, let me know.

Yellow and or amber were very common when I was purchasing. Google Stanley LED you should find a catalogue somewhere I found the name in the LED search just out of interest. Lots of yellow on vehicles, traffic lights these days.

Yes, This is exactly right. And for the same reason perhaps that I am trying to find those same colors in a high MCD output, for large scale model railway signaling purposes. And space inside what I am building is constrained so that 5mm leds won't fit. (unless I really wanted to press the envelope of "scale" beyond that which would be credible- as most model railroaders are "rivet-counters" when it comes to scale and proportion) and the way my signal units are designed, smd's will not work, as the unit requires a through-hole type led. One poster has brought up the viewing angle as a factor-up until this project, I hadn't given that a lot of thought. But I would assume that a greater viewing angle with maximum output would give me what I am looking for, as these are centered behind a prismatic lens. Creating the daytime brilliance effect. Thanks to everyone for their ideas. I will look into this. Mike in Fresno, Ca.