Surefire L1, L2, and EB1 Tac. All three are partial press for low, full press for high. The ElZetta tight high / slightly loosen low forward click tailcap is great, and I finally have one on the way. The ThruNite Scorpion with rotary selector ring on the tail, and forward push tail switch has been very nice for the short period I've had one. I also like the ArmyTek Viking series from my initial use of the Viking S. If I buy another ArmyTek it will be the Predator for the programmable low setting.