This is the coolest flashlights i owned
X2000 Cree P4-WC LED Flashlight (1*18650)
UltraFire TH-T60 HA-II XM-LT6 5-Mode 975-Lumen White LED Flashlight with Strap (1 x 18650)
UltraFire WF-501B Cree R2-WC 250-Lumen LED Flashlight Black (1*18650/2*CR123A)