Cree's XR-E 7090 emitter die has captured the attention of the enthusiast market in a way rarely seen before. Featuring a revolutionary jump in output and efficiency over the previous market leader the Cree XLamp XR-E 7090 and it's Seoul Semiconductor SSC P4 and Edison Edixeon cousins are lighting the way to the future. Simply put they offer extended battery life AND increased brightness in portable lighting when compared to existing white LED offerings - what's not to love? Now these super-emitters have been joined by Lumiled's REBEL and K2 TFFC series of LED's - the more the merrier!