Of course this is not a revolutionary new offering but more an improvement to the existing line. Still I am impressed to see how well Luxeon is keeping up(passing?) with Cree.
The Luxeon Rebel ES can deliver 100 lm/W efficacy at the maximum 1A drive current, or luminaire makers can lower the drive current and achieve even greater 125 lm/W efficacy.
Of note is the 1500mA max current capability and what seems to be awfully close to no sag with increasing current.
I just wish their binning was tighter so you knew better what you were getting.
A little more info.