This Light My Bricks LEGO lighting kit includes everything you need to illuminate your LEGO 21325 set. Travel back to the Middle Ages, hear the hammers striking, and watch the coal glow in the medieval forge of LEGO. The Light My Bricks kit is the perfect addition to this fantastic fan-inspired LEGO set. With 16 individual LEDs and several flicker effects, it creates a realistic, warm ambiance. Thanks to the wireless connections from Light My Bricks, you can still remove the roof to discover the vast amount of medieval details inside in the best light. Light My Bricks offers LEGO fans an easy way to enhance their LEGO models with LED lights. All components in the Light My Bricks sets are plug-and-play capable – no electronics knowledge is required for installation. Light My Bricks parts are small and delicate enough to fit between and under LEGO bricks. With a detailed step-by-step guide (picture-by-picture instructions with minimal English text), anyone can enhance their existing LEGO set with LEDs and make it shine. Contents: 11 x white bit lights with 30 cm cable, 1 x white bit light with 15 cm cable, 5 x orange bit lights with 30 cm cable, 4 x 6-port expansion boards, 3 x effect boards for flickering lighting, 3 x connection cables 5 cm, 1 x connection cable 30 cm, 1 x USB power cable 30 cm (power source not included), 2 x sets of wireless connection contacts, 4 x adhesive squares/corners for mounting, 21 x various LEGO pieces for easy assembly.