The Fenix LD02 v2.0 is a 1xAAA light with a reverse-clicky tailswitch, high-CRI warm-white Cree XQ-E HI, and a 365nm UV secondary emitter. It has a useful selection of modes and reasonable output for its class, though the beam pattern isn't ideal. In a market short on 1xAAA tailswitch lights, this is my favorite.

The Fenix HM50R is a small right-angle flashlight/headlamp using an included 16340 rechargeable battery and USB charging, or disposable CR123A battery. The HM50R features an intentional slow rampdown of its brightness during use designed to prolong runtime despite having hardware capable of sustaining full brightness. There is no way to turn this feature off. It seems like the HM50R is designed for inattentive users, or to compete with low-quality headlamps that advertise absurdly unrealistic runtimes.

The TK25 R&B is an unconventional design with a rotating head to switch between two white, and one each red and blue emitters. It offers very high red and blue output, but no low-output modes to preserve dark adaptation. It's intended for hunting animals that don't react to red light, and following blood trails with blue. It should work well for that application, though better color quality for the white emitters would be most welcome.