Light Up help

Light Up is a logic puzzle with simple rules and challenging solutions.

The rules are simple.
Light Up is played on a rectangular grid. The grid has both black cells and white cells in it. The objective is to place light bulbs on the grid so that every white square is illuminated. A cell is illuminated by a light bulb if they're in the same row or column, and if there are no black cells between them. Also, no light bulb may illuminate another light bulb.
Some of the black cells have numbers in them. A number in a black cell indicates how many light bulbs share an edge with that cell.
Are you lost? Check out the step by step tutorial

Zooming
Pinch with two fingers to zoom in/out. If you use a mouse you can use the scroll button.

Moving
Tap and drag to move the puzzle. If you use a mouse you can click and drag with the middle (scroll) button.

Marking
You can tap/click individual cell to change its state.

When this mode is selected from the game menu the state of the cell is going from "empty" to "light bulb" to "x" to "empty". If you use the right mouse button the states rotate in the opposite order
If you select one of these modes... Simply put - what you see is what you get.
There are some more options in the advanced menu.

Game modes and sizes

  • You can change the game you play from the "hamburger" menu at the top-right corner.
  • You can change the mode / size of the current game from the top menu (click on the down arrow at the top/middle)
  • There are 2 modes which you can play
    • Random - this mode loads a random puzzle from the chosen size
    • Quest - this mode requires you to login. You can then solve a sequence of puzzles with increasing difficulty.

Other helpful tips

  • You can get rid of the address bar and gain extra playing space by dragging the header or the footer quickly upwards so you scroll the page a bit down. It's tricky and you need practice. iOS8+ users - this will be just temporary until you click something in the bottom bar - sad story I know.
  • If you are left handed or just playing with your left hand there is a spacial option in the settings just for you.
  • Try the different helpers in the settings - some will make the puzzle too easy for you, others may automate some trivial tasks.