Lumen Grid: Light Up

Place bulbs on a dark grid and light every open square. Numbered walls show exactly how many bulbs belong next to them. Bulbs cannot shine directly at one another, so use logic to illuminate every row and column without creating a conflict. Lumen Grid is a casual logic puzzle built around the satisfying moment when a dark board glows to life. Highlights • A gentle first 10 stages on compact 3×3 boards • A smooth difficulty curve through 4×4, 5×5, and 6×6 puzzles • 2,000 deterministic puzzles, each verified to have a unique solution • Today's Light for a fresh daily challenge • Smart hints that reveal the next certain move instead of the whole answer • Warm lighting effects, crisp feedback, and completion records • Core puzzle play available offline Solve one quick board when you have a minute, or work through the full collection and improve your best times. Enjoy the small spark of satisfaction when every square lights up. Some screens display ads. Rewarded ads play only when you choose one to receive an extra hint.