Feature of Single Sided Solar Stud : Lamp : LED X3 in Red, White, Yellow, Green & Blue. Stays on more than 10 hours at night & 7 raining days Ultra Bright super LED's, Epoxy with L shaped screws and anti theft patent installation system Solar Cell : Mono Crystalline, 25mW, 2.5V, 120mA Storage Battery : NI-MH or Capacitor Material : Aluminum & PC