💡 Light Up

Place lights so every cell is lit, without lights seeing each other.

A.K.A.

Also known as: Light Placement, Bijutsukan

Category

Grid Shading

How to Play

1. Place light bulbs in white cells
2. Bulbs illuminate all cells in their row and column until blocked
3. Black cells block light
4. Numbers on black cells show how many adjacent bulbs
5. No bulb can illuminate another bulb

Puzzle Source

🔧 Generator

Puzzles are algorithmically generated on-the-fly.

Source: Generated bulb placement puzzles

Tips & Strategy

• Numbered cells with few empty neighbors are easier
• A 4 means all four neighbors have bulbs
• A 0 means no adjacent bulbs - helpful for elimination

Issues & Bugs

🔍 Search existing issues for "Lightup"

📝 Report a new bug

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Part of the Enigma puzzle collection