Lantern Out is a shared daily Lights Out puzzle: tapping a lantern flips it and its four orthogonal neighbours, and the goal is darkness — all 25 out. Every UTC day everyone gets the same seeded board, built from six to eight taps, so par is the number of taps the puzzle was made from and a solution always fits inside it. Clear it inside par to save taps, keep a daily streak, and read the world's honest cleared count. A practice mode with fresh lanterns is always open; sign-in is optional and nothing is ever simulated.