Place bulbs to illuminate every cell, without any two lighting each other, and satisfy the wall clues.
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How to play
Place light bulbs on the white cells. Each bulb shines along its row and column until a black wall blocks it. Every white cell must end up lit, no bulb may shine directly on another bulb, and every numbered wall must touch exactly that many bulbs in the four cells around it.
A bulb lights its whole row and column until a wall stops the beam.
No two bulbs may illuminate each other.
Numbered walls must have exactly that many adjacent bulbs.
Controls
Desktop: click a cell to place or remove a bulb; mark cells you've ruled out.
Phone & tablet: tap a cell to place a bulb and tap again to clear it.
Game modes
Daily seeded puzzle shared by all players.
Practice with fresh boards.
Tips & strategy
Start from the wall clues of 0 and 4, they force or forbid bulbs immediately.
When a cell can only be lit from one direction, that bulb's position is fixed.
About Light Up
Light Up is an original build of the bulb-placement logic puzzle, free to play in your browser with a daily board and endless practice. Made in-house at PlayPendium.
A free, original browser game on PlayPendium. No download, no install.
