Conical 5mm Wide-Angle LEDs are the most durable and brightest Christmas lights available. Almost all professional Christmas light installers use these lights for their displays. Conical LEDs are waterproof and snowproof because they are injection molded into their plastic cordage.
Surefire has released the Titan Plus, a keychain-sized flashlight that produces 300 lumens in its highest light mode. Prior to this release, the brightest keychain light produced about 80-120 lumens, so this threefold increase is significant.
Wool is the warmest blanket material, especially wool from animals who live in cold terrains. Wool is a natural material that includes a crimp, which helps to hold in more heat than a material with an open weave. It also provides natural insulation.