Lights Out
Turn off all the lights! Clicking toggles adjacent lights too.
Lights Out
Turn off all the lights to win!
🖱️ Click a light to toggle it
➕ Adjacent lights also toggle
🎯 Level: 1
About Lights Out
Lights Out is a classic electronic puzzle game released by Tiger Electronics in 1995. The game became a huge hit and spawned numerous variations and digital versions. Its simple rules but challenging gameplay make it perfect for puzzle enthusiasts of all ages.
The core mechanic is brilliantly simple: when you press a button, it toggles not just that light, but all orthogonally adjacent lights as well. This creates a cascading effect where each move affects multiple parts of the puzzle.
Mathematically, Lights Out is related to linear algebra over the field GF(2), making it a favorite subject for mathematicians and computer scientists studying solvability and optimal solutions.
How to Play Lights Out
Understand the Goal
Your objective is to turn off ALL lights on the grid. When all lights are off, you win!
Learn the Toggle Mechanic
Clicking any light toggles it AND all 4 adjacent lights (up, down, left, right). A lit light turns off, an off light turns on.
Think Strategically
Plan your moves carefully. Random clicking usually won't work - you need to think about how each move affects the whole grid.
Tips & Strategies
- •Try the "chase the lights" strategy: work from top to bottom, pressing lights in the row below to turn off lights in the current row
- •Remember that pressing the same button twice cancels out - it's like it was never pressed
- •Corner lights only affect 3 cells, edge lights affect 4, center lights affect 5
- •The order of clicks doesn't matter - only which buttons you press counts
- •If stuck, try clicking in symmetric patterns to maintain balance
Why Play Lights Out?
Pattern Recognition
Train your brain to see patterns
Strategic Thinking
Plan moves ahead for success
Quick to Learn
Simple rules, deep gameplay
Satisfying Solutions
Great sense of accomplishment