Viridian tac light - Viridian CTL Compact Tactical Light

I put this on a compact beretta px4 storm. I modified my kydex holster to accomodate the light. It functions well just not at the level i like. I was trying to go a cheaper route than the xc1 by surefire but i find myself waiting for the refund now to apply it towards the purchase of that pistol light. Its controls are good and it worked well. Every once in a while it wouldnt turn on when button was pressed. Unsure of why that happened??? All in all its a good light if u just can bear to pay $250 for a pistol light.