There are no off-the-shelf lights with the Seoul P4 LEDs yet, but many with the Cree P4. I believe they will be easily upgradeable to Cree Q3 later on, so no worries about buying them now! Jetbeam CL-E, Fenix P1D CE, Rexlight, Dealxtreme 3w, Lumapower D-mini.... all great choices!