These Bit Lights are tiny LEDs designed to fit under and between LEGO pieces, allowing for a variety of LEGO lighting applications and customizations. Light my Bricks Bit Lights are available in different colors and effects, including built-in flashing. This blue Bit Light comes with a 30 cm long connecting cable and is sold in a pack of four. Light my Bricks provides LEGO fans with an easy way to enhance their LEGO models with LED lights. All Light my Bricks components are plug-and-play compatible—no electronics knowledge is required for installation. Light my Bricks parts are small and delicate enough to fit between and under LEGO bricks. LEGO is a trademark of the LEGO Group. The use of LEGO trademarks is solely for the clear identification of the LEGO products to which Light my Bricks products are compatible and is not intended to infringe on any rights.