Light Up
Place lamps until every room is lit. Lamps shine along rows and columns until a wall, never see each other, and numbered walls tell how many lamps touch them.
Play nowHow to play
Controls
Tap- Tap to place a lamp, tap again for a dot, again to clear.
- Light every white cell.
- Lamps must not shine on each other.
About the game
Light Up is a classic logic puzzle also known as Akari. The board is a dark house of white rooms and black walls. Every lamp you place sends light along its row and column until a wall stops it, and you watch the beams spread across the floor. Your job is to light every white cell. Two lamps may never shine on each other, and a wall with a number must touch exactly that many lamps on its four sides.
Use dots to mark cells you know cannot hold a lamp; they are your notes. Each puzzle has one solution, so start with the walls marked 0 and 4, which tell you a lot at once. Forty puzzles grow from six by six to ten by ten. Mistakes glow red as soon as two lamps see each other, and the hint places one correct lamp.
Free to play in your browser. No download, no sign-up. Works on phones, tablets and computers. Your progress is saved on this device.