Lights Puzzle — free online Puzzle game
Each tap flips a light and its neighbours — switch them all off.
Lights Puzzle is a free online logic game. Tapping a light toggles it and its four neighbours; your goal is to switch every light on the board off. Play on a 3×3, 5×5 or 7×7 grid. Every board is built backwards from a solved one, so a solution always exists, and the game shows the par — the fewest moves possible — so you know how close you came. Undo, restart and best scores per size are included. Play in your browser with no download and no sign-up.
Quick start
- Choose 3×3, 5×5 or 7×7.
- Tap a lit square to flip it and its neighbours.
- Switch every light off.
How to play Lights Puzzle
- The board starts with some lights on.
- Tapping a square toggles it and the squares directly above, below, left and right of it.
- Your goal is to turn every light off.
- Every board is created by making random taps on a solved board, so a solution always exists.
- Par is the fewest taps the board can be solved in. Try to finish on par.
Controls
- Toggle a light: tap or click it
- Undo, restart and new board: the buttons under the grid
- Board size: easy 3×3, normal 5×5, hard 7×7
Solving tips
- The order of taps does not matter, and tapping the same square twice cancels out.
- Chase the lights down: clear the top row by tapping the squares directly below its lit cells, then repeat row by row.
- If lights remain on the bottom row, the pattern there tells you which top-row squares to tap first.
Frequently asked questions
Is every board solvable?
Yes. Boards are built backwards from a solved board, so there is always a solution.
Is Lights Puzzle free?
Yes. Lights Puzzle is completely free to play in your browser, with no download, no account and no in-game purchases.
Is my progress saved?
Your best moves for each board size are saved locally in your browser on this device. Clearing site data resets them.
Can I play on my phone?
Yes. Lights Puzzle is built for touch screens as well as mouse and keyboard, and it fits portrait and landscape screens.