Objectives / Rules
- Light up every square in the grid.
- A number in a square tells you how many bulbs surround that square (but not diagonally).
- A square is lit if it's in the same row or column as a bulb, as long as there are no black blocks between them.
- A bulb can't light another bulb.
See the Getting Started section below for extra tips and tricks.
![Light Up Puzzle](/gifs_lightup20220602a/help1.png)
What are the numbers for?
Each number tells us how many Lights surround that square.
Click or move your mouse over the puzzle to see the answer.
Getting Started
![Help 1](/gifs_lightup20220602a/help1.png)
![Help 2](/gifs_lightup20220602a/help2.png)
Step 2
None of these squares can be Lights as they all surround 0 clues.
None of these squares can be Lights as they all surround 0 clues.
![Help 3](/gifs_lightup20220602a/help3.png)
Step 3
These are the only three squares that can satisfy the 3 clue.
These are the only three squares that can satisfy the 3 clue.
![Help 4](/gifs_lightup20220602a/help4.png)
Step 4
This is the only square that can light the indicated square.
The puzzle is now well on its way to completion.
Note: 'show dots on lit squares' has been ticked / checked to make lit squares easier to see.
This is the only square that can light the indicated square.
The puzzle is now well on its way to completion.
Note: 'show dots on lit squares' has been ticked / checked to make lit squares easier to see.
Note: BrainBashers has a Dark Mode setting.