Lego Parts: Electric, Light Brick 2 x 3 x 1 1/3 with Trans-Clear Top and Yellow LED Light
USB to AA Battery Pack, LEGO® lighting – Light My Bricks USA
LEGO - Electric, Light Brick 2 x 4 with Red LED / brand new Battery | eBay
Lego Parts: Electric, Light Brick 2 x 3 x 1 1/3 with Trans-Clear Top and Yellow LED Light
LED Red and Blue Blinking studs with Battery Brick - Light up your LEGO City | eBay
LED Lighting Kit - LEGO Ghostbusters Proton Pack with 2x4 Battery Bric – Brick Loot
Lego Light Brick LED Electric 2x3x1 1/3 Trans-Red or Clear Top Christmas House | eBay
USB Power Bank (3350 mAh), LEGO® lighting – Light My Bricks USA
Sawaruita Light Up Building Bricks Multicolor LED Light Brick Sets Classic Transparent 2x2 2x3 Building Block Accessories Kit Toys Compatible with All Major Brands
LEGO light bricks – more options!
BrickLink - Part 54930c01 : LEGO Electric, Light Brick 2 x 3 x 1 1/3 with Trans-Red Top and Red LED Light [Electric, Light & Sound] - BrickLink Reference Catalog
Light Brick 2 x 3 - How long can it work? And can it be damaged? - General LEGO Discussion - Eurobricks Forums
LEGO light bricks – more options!
Light Kit for LEGO - Double Red LED LEGO Studs with 2x4 Battery Brick – Brick Loot