Yes, they'll work. Safariland has a single fit code for most "standard" weapon lights (obviously per gun). The 63XX series are also pretty forgiving...
I can tell you my personal experience with a friend of the family. What you are describing was not the case. No phones allowed in the room. Landlines...
I like the EMPs but wish they had a model with a shorter grip, either with the current barrel or a longer one. I'm surprised there aren't more scaled...