Lights Out

About This Game

How do I play Lights Out?

Click a light to toggle it and its neighbors — turn them all off The game is completely free and runs directly in your browser — no plugins or downloads needed.

What are the rules? Why does clicking one light affect its neighbors?

Clicking a light toggles it and its up/down/left/right neighbors on or off. Each click affects up to 5 lights. The goal is to find the right combination of clicks to turn every light off.

Is there a mathematical solution, or is it trial and error?

There is a mathematical solution using linear algebra (matrix solving) to find the optimal answer. However, most players can also solve it through logic — turn off all lights in the upper rows first, then the bottom row's state will tell you which lights in the first row need to be toggled.

How many difficulty levels or stages does Lights Out have?

Lights Out offers multiple difficulty levels ranging from beginner to expert. Some levels are procedurally generated, ensuring a unique experience every time you play and greatly enhancing replayability.

What should I do if I get stuck in Lights Out? Is there a hint system?

If you get stuck, try approaching the puzzle from a different angle. Lights Out is designed to encourage logical reasoning and patience. Some levels support undo actions, allowing you to backtrack and try alternative strategies.

Can I play Lights Out on my phone?

Yes. Lights Out supports mobile browsers with touch-friendly controls, so you can play anytime, anywhere.