The Premier Decorations 600 LED Battery Operated TimeLights - White, offer a clever Christmas lighting solution for both indoor and outdoor use. They use superbright, energy efficient LEDs which are long lasting and durable. Fitted with an 8 setting multi-action controller with a built-in 6 hours on/18 hours off timer. These lights require 3 x C batteries (not included). They are also available in multi-coloured and warm white.