Xm20ks are the bluest your gonna get... Par and everything else sucks but the color is awesome... I run radiums now there not even close to being as blue but the par is great.... Radium are more 14k
XM20K is more blue than Radium 20K. I use both and like both, but for different reasons. Radium 20K has much better par and is brighter, but not as blue.
with radiums it does but not the xms..... radium are European bulbs that need a m80 mag "hqi" ballast to fire properly.... pfo made them but there discontinued.....