I did that with eneloops in a 3D host and a PR - M16 lamp adapter. I didn't care for it much. Most of those M16 reflector+lamp assemblies are semi-transparent. A large percentage of light shines through the reflector and ends up being wasted lumens that get lost inside the MAG bezel, and never make it OTF. I think I had this light configured this way for 2-3 days. Pulled it apart and converted it back to a MAG-1185 with all those eneloops... much more efficient that way.