ThePuzzleLabs

Free printable Light Up (Akari) worksheets

Play Light Up Live

525 print-ready PDF packs across five difficulty levels — solid black walls with numbered clues, plus a full answer key on the last page showing where every bulb goes. Easy/Medium/Hard pack 8 puzzles each (4 per page); Expert/Einstein use a larger 2-per-page layout with 4 puzzles per pack. Download and print. No signup, no ads.

Easy Light Up

5×5 grids with plenty of numbered walls. A gentle introduction to illumination, mutual visibility, and wall clues.

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Medium Light Up

7×7 grids with more open space and fewer clues. Lean on the diagonal-dot rule around 3s and 4s.

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Hard Light Up

10×10 grids with sparser walls and larger dark regions. Forced-lighting and reachability deductions.

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Expert Light Up

12×12 grids requiring contradiction-level logic. 4 puzzles per pack, 2 per page for clarity.

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Einstein Light Up

14×14 grids at the hardest tier — sparse clues, long chains of deduction. 4 puzzles per pack, 2 per page.

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About these worksheets

Each PDF is three pages: two pages of puzzle grids followed by a full answer key marking every bulb. Walls are drawn as solid black cells; numbered walls show how many of their orthogonal neighbours hold a bulb. All puzzles are computer-verified to have a unique solution reachable by pure logic — no guessing.

Easy, Medium, and Hard have 75 packs each (8 puzzles per pack). Expert ships 150 packs and Einstein 150 packs, 4 puzzles per pack in the larger two-per-page layout.

If you'd rather solve interactively, play online with hints and step-by-step solutions. Or read the Light Up rules guide to learn the illumination and no-mutual-visibility constraints.

Play Light Up Live