Place lamps so every square is lit, no lamp shines on another, and every numbered wall is satisfied. One logical solution, never a guess — on iPhone and iPad.
One shared board a day, the same for everyone — solve it on your own time. Or roll unlimited fresh boards in Practice mode.
Play on a 6×6, 7×7, 8×8, or 9×9 grid. Pick the size that fits the moment — a quick light-up or a longer sit.
Easy, Medium, Hard, and Expert, chosen independently of board size. Every puzzle has exactly one solution you can reason out — never a guess.
Fully localized in fifteen languages, so the whole game speaks yours — English, French, Spanish, German, Japanese, and more.
Light, Dark, Paper, Dusk, and a colour-blind-friendly Accessible palette that stays readable in any light.
No ads. No tracking. No accounts. Everything runs on your device, and your progress stays there.
Coming soon to the App Store. iPhone & iPad.
Coming soon to the App Store