Description of light up earrings: Crystal Lights, Quality C.Z. Earrings light up giving you a glinting accent during the night or day. They're fun and safe. The simple C.Z. studs look just like regular earrings, but when illuminated it gives off a bright crystal glow that is truly unique. The secret to these earrings are the micro LED lights hidden bellow the C.Z. stone that are lit up using a battery pack backing instead of the normal clinch backing, the result long lasting bright light any time you want. Once activated they'll light up for 20 to 30 hours. Available in 7 awesome colors you are sure to find a pair that will accompany your personal style. Red, Yellow, White, Green, Pink, Blue, or Purple are waiting for your choice. Whether it's a night on the town or late night at the club your ears will sparkle with the earrings like a true star. Light up your next party with these glowing earrings.