As technology advances, changes occur. BK's BKSSL® Power of 'X' is certainly no exception! Within their designed modules, they've updated the XSM module to the newly released XTM module. In doing so, they reduced the fixture wattage whilst retaining the lumen output on the Power of 'X' modules (updated submittals and photometrics can be found on their website). With this BK has also added a new, higher lumen package than what was originally offered. That's huge!
The charts below highlight the changes recently made to the BKSSL® Power of 'X' sources.
12W, 20W & 24W BKSSL Power of 'X' (associated with Denali and HP2 etc)
10W Power of 'X' (associated with ArtiStar™)