How to play Lights Out

Tap any light. That light and the four lights touching it — up, down, left and right — all flip on or off. The goal is simple: turn every light off, so the whole board goes dark.

Each puzzle is generated to be solvable and starts with a fresh arrangement every game. Smaller boards are a warm-up; Classic 5×5 is the standard challenge, and Hard 7×7 will test your working memory hard. Use the move counter and timer to chase your best score.