Best for Keeping Fido Safe

Ruffwear's The Beacon

Clip this 1.5 inch LED to Buddy's collar (split-ring or clip) for after-dark walks. The ring helps it hang beyond long hair and the dispersing lens casts a large red glow for high visibility. Watertight and tough, it's great for off-leash time. For keeping dogs with darker fur safe on low-lit streets, switch to the slow or fast flash modes.
[$17; ruffwear.com]