The Wowtac A4 is a 2x18650 flashlight intended for long-distance illumination - a thrower. It's the lowest price thrower I know of using the XHP35 HI, giving it high output for its class, and full output on low batteries. I just wish it came in a warmer tint.

The Haikelite MT-01 is a 3x18650 general-purpose light the size of a Red Bull can. Its large battery capacity and stable output make it a good choice for extended use. It also provides the option of using fewer 18650s if necessary.