I think Photon light has shifted to using the Nichia DS emitter (2x brighter) on their Photons. It's not very clear on their website, but you can check out post #18 here
Geez I like the DX microlights at 4-5 bucks for ten you cant beat it. Plus they are brighter than any keychain light i have ever seen . Side by side to those Academy camolights, Inova micros, etc. that I have seen these are the brightest. :candle: