LEGO Light - Brick 2 x 3 x 1 1/3 with LED light (glows orange)
Electric, Light Brick 2 x 3 x 1 1/3 with Trans-Clear Top and Yellow LED Light (Glows Orange) : Part 54930c02 | BrickLink
Blue Light-Up 2x4 Brick (Blue Light) - Compatible w/ LEGO – The Brick Show Shop
LEGO® Medieval Blacksmith 21325 Light Kit – Light My Bricks USA
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
Lego Electric Light Brick 2 x 3 x 1 1/3 WHITE top and Yellow LED 54930c02 | eBay
Light Brick Studio
Green Light-Up 2x3 Brick (Green Light) - Compatible w/ LEGO – The Brick Show Shop
Amazon.com: Light Up Bricks Accessories Kits, 2x2 Classic Transparent LED Light Brick Pack, 14 Pieces Parts Building Blocks Set Toys : Toys & Games
LEGO part 4771 - White Electric, Light Brick 1 x 4 with Twin Top Lights at BrickScout