I don't think it can be done. I've heard it will fry the SSC P4. The L4 has a LUX V, if you bought a KL1 head you can swap the emitter with a SSC P4 (a LUX III is in the stock KL1) and replace the optic with a Mcr20 reflector. I have done this mod myself and am truely happy with the results. It is absoutely Awesome!! More runtime, Excellent Throw, and VERY Bright!!!