It’s a Space Invaders Light Up T-Shirt!!!! This is the ultimate in uber-retro-geekiness (URG). You can get this shirt in your choice of one of the four types of Space Invaders:
This officially licensed shirt is powered by a removable (for washing) battery pack that runs on 4 AAA batteries. It definitely makes a cool statement and costs about $38 from Firebox.
IP Brothers LED Vest Reflective Belt for Running, Cycling & Walking Illuminated Flashing & Multicolored LED Fiber Optics, Adjustable, Lightweight, Weatherproof - for Men, Women & Kids, Blue