Lights Out

Lights Out is a classic electronic puzzle game originally released by Tiger Electronics in 1995. The game presents a grid of lights, some on and some off. Clicking any light toggles it and its four adjacent neighbors (up, down, left, right). The goal is to turn all lights off. It sounds simple, but the cascading toggles create surprisingly complex puzzles that require logical thinking and pattern recognition to solve.

1. The game starts with a grid of lights in a random on/off pattern.
2. Click any light to toggle it and its four neighbors (up, down, left, right).
3. Your goal is to turn ALL lights off.
4. Choose your grid size: 3x3 (easy), 5x5 (medium), 7x7 (hard), or 9x9 (expert).
5. Try to solve it in as few clicks as possible.
6. The counter tracks how many lights remain on and how many moves you've made.

• Clicking a light toggles it between on (lit) and off (dark).
• All four adjacent neighbors also toggle (not diagonal neighbors).
• Edge and corner lights have fewer neighbors, so fewer lights toggle.
• The puzzle is solved when every light on the grid is off.
• Every puzzle generated is guaranteed to be solvable.

• Work systematically from top to bottom — solve the top row first, then use the row below to fix it.
• On a 5x5 grid, the 'chase the lights' method works: fix each row by clicking the cell below each lit cell.
• The order of clicks doesn't matter — clicking the same set of cells in any order gives the same result.
• Clicking the same cell twice cancels out, so every cell needs to be clicked at most once.
• For the 3x3 grid, there are only a few patterns to memorize.

• 3x3 Grid: Quick introductory puzzle with just 9 lights.
• 5x5 Grid: The classic Lights Out challenge.
• 7x7 Grid: Extended grid for experienced puzzle solvers.
• 9x9 Grid: The ultimate challenge with 81 lights and complex cascading toggles.

• Lights Out is a deceptively deep puzzle. The mechanic is instantly understood — click a light, neighbors toggle.
• Finding the solution requires genuine logical reasoning. It makes you feel brilliant when you solve it.
• The small grid size means games are quick, but the challenge scales beautifully with larger grids.

Play Lights Out free in your browser with four difficulty levels. No downloads needed — just click, toggle, and solve. Track your moves and try to beat each grid in the fewest clicks possible.

Lights Out is a pure logic puzzle with elegant simplicity. Toggle lights, think ahead, and turn them all off. It's quick to play, deeply satisfying to solve, and endlessly replayable across different grid sizes.