Dropped a Cree XT-E Royal Blue D46 300LM 455nm LED in a C8 host today. Absolutely the most beautiful rich royal blue color I have ever seen and want to take it a step further now with a more focused beam. Anyone know of another 455nm LED that would tend to have a more focused beam when put in a C8? Also would be nice if it was as bright as the XT-E that I have now. The XT-E/C8 combo does throw pretty good, just want to know if I can do better or not or maybe use a different host with optics of some sort.
Here's a pic of the xte-455nm color. My camera can't pick up the blue in the hot spot but picks up the blue everywhere else pretty good. It's really a very deep rich RB.
Nice find thanks! Just found it on a 20mm star that will fit a C8. Max.forward current is 3000mA and my XT-E is only 1000mA so it should be interesting how it shines.
Hard to know for sure I think....afaik I only see the 300 lumens mentioned for the XT-E at fastech where I bought it on a 20mm star, but I never saw 300 lumens mentioned anywhere on the cree data sheet that I could see. I will say it is way brighter than I expected it to be and just looking at it, 300 lumens does seem on the low side.
As for the MC13, I'm guessing because of the optics it's probably really focusing the beam so that it looks way brighter than the 115 lumens would suggest too.
Also noticed the XT-E royal blue on fastech says max 1000mA but other sites say max is 1500mA. Anyone drive the XT-E RB to 1500mA without any problems? The driver I used from Simon was max 1000mA.
If you look at the datasheets, minimum flux for different bins, output (for royal blue LEDs) is always stated in mW, any conversion to lumens is not manufacturer responsibility. Small LEDs will have less output and typically more throw, large LEDs will have more output and typically less throw. Domeless LEDs like the Osram have higher throw for the same emitter area. The max current in the datasheet is always a conservative number.
It’s not really much more efficient, it just measured by the manufacturer at higher current, but it supports higher current and I think has smaller area than the XT-E and no dome, so throw should be significantly higher.
With the star it's pretty cheap and I have a spare C8 waiting to do mods so I can at least give it a try to compare. Will post back in this thread with some comparison pics once I get it. Just a toy as I like coloured lights, especially with Winter coming and lighting up the snow. Would be nice to try it on an L2 as well but I don't want to give out so much bucks for an L2 host at the moment.
