Blue Nichia 219C anyone? :bigsmile: 80+ CRI?? (Just kidding about the last part)
I had one of those insulation gaskets on the MPCB of a Convoy M1 which I was taking off, was pretty stuck on there, and something must have slipped and it took the dome off the 219C I had in there together with the phosphor. I was kind of disgusted and thought I had ruined it but figured hey let’s turn it on and see if anything happens! It is very royal blue now and throws quite well.
I am not even sure how I took the dome off and how it came off that cleanly and most importantly the led was not ruined!
So, anyone want a blue M1 8x 7135 Guppy v2 firmware with a modded tailcap?
Yes I know how phosphor makes a blue light turn white. (I don’t post much but have been modding flashlights for a few years now) There won’t be any more UV than a royal blue led of the same nature if nichia did in fact make one.
I didn’t. I don’t know how to take beamshots. I was just surprised that it still worked even tho it is now blue. The phosphor stuck to the dome, it’s like it all came off in one piece. I imagine if someone wanted a royal blue led in XP size with fairly high lumens for whatever reason, this would be an option, though I don’t know if what I did could be repeatable to any degree. I think you can get a XPE in blue, not? It would not have the lumens this does though. I was really surprised by how far it threw and the overall output.
The fact this happened agrees with what I read by someone else that was trying to dedome these things, the phosphor didn’t want to stay on the die. I’ve tried changing an XML to blue before, I just ended up killing it.
As far as I know the most recent class of emitters that come in the “pure” colors is the XP-E2. I’ve got a 485nm blue XP-E2, currently living in a blue Convoy S2+ host. Mine’s driven at 3 amps and does fine with it. It looks like this:
If anyone is interested, here’s a beamshot:
In real life that center spot is blue as well but my camera didn’t know how to deal with it and over-exposed. Obviously those are kid’s toys and are normally very brightly colored. The blue emitter shows none of it except for some of the orange that’s kinda fluorescing. Obviously, even my purposely-made blue emitter has some UV in it.
The fact that you can’t get XP-G/XM-L class emitters in these pure colors leads me to believe that its not just a “normal” blue emitter under all our whites. And I wouldn’t expect it to be really. Its job is to excite phosphors, not make blue, so I would imagine its specifically tuned to do that. I think the fact that it winds up mostly blue is due to efficiency and there’s probably a lot more wavelengths mixed in.
You’re probably right, but I made a royal blue light with a Luxeon M emitter. I believe it also had the 485nm wavelength like your S2+. To me, the color looked pretty much identical.
Edit: Funny you chose a blue host for your blue led. Was that a coincidence?
If you’re referring to the center spot in my triple-light photo above, the bright white center spot in that photo is mostly the reflection of some very gentle overhead lighting, but yes the three beams converge to form what is basically white light. Here’s another photo taken at an angle and without any overhead lighting. You can still see the white center where the colors mix, but its a lot more subtle.
Its worth pointing out that you can’t point all three lights at a wall somewhere and make white light. Whichever light is the strongest basically overwhelms the others and they seem to disappear. Its a strange effect to witness.
