I just had to try one.. Bought one of the KD XT-E P60 Drop-in modules and ordered an XT-E Royal Blue emitter from Mouser.. De-Soldered the white XT-E, Reflowed the Royal Blue XT-E, and here is what I get..
It's blindingly bright.. Not as many raw lumens as an XM-L, obviously, but the Royal Blue is so bright to the eye.. Yikes.
PPtk
I'll grab an outdoor beam shot at further distance once it gets dark out. Indoors, it's just totally saturating my camera. That beam is NOT white in the center, it's deeproyal blue.
Blue light (just short of UV) is used a lot for seeing blood, blood trails, etc. It is also used for treating acne and a few other medical maladies. I want one. Just because. I have the usual collection of red, amber and blue filters but there is a lot of lumen loss involved. I need to look into some quality red and blue p60 drop-ins. Should be interesting.
Nice work pilot PTK,how many amps does this driver pull?I think this would be a really useful blood trail light and I may just have to build one myself.The only blue led light I have is the pentagonlight l2 with 19 5mm led's and its beam is not very useful.
While the blue LEDs may be used for finding blood and other things, however we are not focusing on that when we make them. The XT-E Royal Blue was made to facilitate companies to use Remote Phosphor technology. http://www.cree.com/news-and-events/cree-news/press-releases/2011/august/110802-xt-e-royal
Two reasons.. 1) Because I could. 2) Because the XT-E only comes in White and Royal Blue.
For a flashlight, I would expect XR-E to give a slightly better beam profile due to it's flat die. That said, I don't find anything displeasing about the XT-E's beam.
Royal Blue != UV
UV is generally accepted to be less than 400nm. This royal blue is 460. Not UV.