$12 for a Shop Tough LED premium webbing dog collar ($49.95 list price).
Choose from the following: Small/medium collar (13.5"–20.5") in blue, red, or white or Large collar (18"–24") in blue, red, or white
$15 for a Shop Tough LED premium webbing dog leash in blue, red, or white ($51.95 list price)
$22 for a combo pack with a Shop Tough LED premium webbing dog leash and a premium webbing dog collar ($97.95 list price). Shop Tough's durable LED dog collars and leashes help keep canines and their owners safe and visible during the dusk, evening, and early-morning hours. Two layers of premium webbing surround and seal off LED light strips, which can hold steady, blink, or flash based on preferences.
I bought a similar product on EBay last year and it's very helpful walking at night. The light is very bright, and circles the dog's neck so they're visible from all sides. It was too small for my Great Dane but I pulled out the stitches and extended it 3" with no problem.