The Premier Decorations 100 LED Battery Operated TimeLights - Warm 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/18hours off timer. These lights require 3 AA batteries (not included). They are also available in white and multi-coloured.