I run a Surefire Scout light m300a , it's 125 lumens I believe , quite lite and indestructible. The beam has great throw. I've also used the Inforce WML , it's a really good light , extremely lite but I prefer a tape switch to having to modify my grip to have the light at the ready at all times. Maybe with the thorntail offset mount it would work out better ? Then again surefire is a proven system