Amazon.com: Sawaruita Light Up Building Bricks Multicolor LED Light Brick Sets Classic Transparent 2x2 2x3 Building Block Accessories Kit Toys Compatible with All Major Brands : Toys & Games
Amazon.com: Lego Parts: Electric, Light Brick 2 x 3 x 1 1/3 with Trans-Clear Top and Yellow LED Light : Toys & Games
LED Lighting Kit - Red & Blue Blinking LEGO Studs with 2x3 Battery Brick – Brick Loot
LEGO® Detective's Office 10246 Light Kit – Light My Bricks USA
LEGO-Compatible Brick Lighting | Wireless LEDs for Model Making | Adafruit Learning System