The Light Control System (LCS) is very versatile. As such, there are a lot of possible configurations.
We do not sell Surefire brand lights. But we offer our Light Control System (LCS) for them. And we sell the Surefire ST_07 remote switch along with the Surefire UE-07 remote switch/tail-cap combo. And you can bundle those with the LCS.
If you have a Surefire Scout light (or X300/400 series), you simply need to establish if you have a socketed tail-cap or not. If you have one, you need the LCS with the ST-07. If you do not have the socketed tail-cap on your light, you need the LCS with the UE-07.