Round 5V LED Matrix Kit - Lamp Kit and Battery Holders (Kit of 30)Speed up lesson planning and prep with these super convenient Round LED Matrix Kits. Each kit comprises 30 Kitronik Round 5V LED Matrix Lamp Kits along with 3 packs of 10 AA Battery Holders with flying leads, ideal for classroom use with 30 students. These kits are perfect for designing compact, bright lighting solutions with a combined output of around 16,000 mCd. The round 5V LED matrix lamp kits are compact, easy to mount, and include 9 white super