Puzzle Code = LightUp-0528-15x15-Level3-J108805 = www.brainbashers.com/j108805
Today's Light Up Puzzles
7 x 7 Easy Medium Hard
10 x 10 Easy Medium Hard
15 x 15 Easy Medium Hard
20 x 20 Easy Medium Hard
25 x 25 Weekly Special
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Would you like a (free) Sudoku for a small, local, community newsletter? Or a monthly puzzle for your company's bulletin? Or a range of puzzles for your local newspaper? Or puzzles for a project of any size? KNS Puzzles was set up by my brother (Julian), specifically to provide commercial access to all of my content (current and old). If it involves BrainBashers puzzles, he will try his best to help. Take a look at my contact page for more information.
Objective / Rules
Light up every square in the grid.
A number in a square indicates how many bulbs share an edge (but not diagonally) with that square.
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.
No bulb may light another bulb.
Read the help / walkthrough page on Light Up for a more detailed explanation and a walkthrough.
Note: only when supported by your computer / device / browser / etc.
Left-click = bulb >> X >> none.
Right-click = X >> bulb >> none.
Clicking a clue square will 'tick' it.
If you click 'Check' the system will check for incorrect squares. If 'Show mistakes when checking' is checked they will be marked in red. If 'Highlight clues' is checked any clue where the correct number of bulbs surround the clue will be highlighted this does not mean that the answer is correct.
If you click 'Show dots on lit squares' the system will show lit squares with the addition of a dot, which might make the lit squares easier to see.
Every BrainBashers puzzle has exactly one correct answer, which can be found using logic and deduction alone, and no guesses are ever required. If you think that you have found another answer, then please check the rules carefully for a reason the other answer isn't allowed.