Light Up - Lamp Puzzle

Light Up, also known as Akari, is a clean, relaxing logic puzzle. Place bulbs on white cells until every white cell is lit. A bulb lights its whole row and column until a black cell or the edge stops it. Bulbs must never light each other, and a digit on a black cell tells how many bulbs touch it by a side. Every board has exactly one solution, and you can always reach it by logic alone. No guessing needed. • A 40-level campaign that grows from 6×6 to 14×14 boards • A new Daily Challenge every day, with a streak to keep • Quick play on 6×6, 7×7, 10×10 and 14×14 boards • Mark cells with a dot to keep your notes tidy • Step-by-step hints when you get stuck • A short tutorial that teaches every rule • Light and dark themes, large text support • No account needed, and you can play offline Tap a cell to set or remove a dot. Double-tap to place or remove a bulb. Drag your finger to set or remove many dots at once. Simple to learn, satisfying to master. Light Up is free. Ads appear only when you choose to watch one for a reward, such as extra energy or a hint.