Light Up
Place lamps until every white square is lit.
How to play Light Up
A lamp lights its row and column until a black square blocks it. Light all white squares without any lamp shining on another. Numbers count lamps immediately beside a black square. Play with the original Nickelbar rules and board drawings. Help below the game lists its keyboard and mouse shortcuts. Your current game stays in this browser tab.
- Click a white square or press Space to place or remove a lamp.
- Right-click or press X to mark a square that cannot hold a lamp.
- Meet every numbered clue and light the whole board.
Keyboard & mouse controls
Hover moves the cursor, LEFT does what SPACE does, RIGHT marks "no light"
- Arrow keys
- Move or select a square
- Space / Enter
- Play the selected move, or resume
- N / P
- New game / pause
- H / Tab
- Help and settings / choose a game
- U
- Undo (where available)
Click the board before using keyboard controls. On a phone, you can also use the buttons beneath it.
Common questions
Is Light Up free?
Yes. Play in your browser without an account or a download.
Can I pause and come back?
Press P to pause. Your current game is kept in this browser tab’s session; your best score is stored on this device. Clearing browser data removes saved progress.
Where is this game from?
The game engine and board drawings come from Nickelbar by Cob Muddybug, adapted to run in a browser. MIT licence and credit.