Today's room
—
can you light up the room?
№ 1Lightly is a free daily lamp-placing logic puzzle (the type often called light-up). Everyone gets the same room each day: a grid of floor cells and dark walls, some of them numbered. Your job is to place lamps so the whole floor is lit.
A lamp lights its own cell and shines along its row and column in both directions until it hits a wall or the edge. There are three rules. Every floor cell must be lit. No lamp may shine on another lamp. A numbered wall must have exactly that many lamps directly next to it (above, below, left or right; diagonals don't count). Walls without a number can have any number of lamps beside them. Tap a cell once to place a lamp, twice to mark it ✕ for "no lamp here", and a third time to clear it. The light spreads as you play, lamps that shine on each other turn red, and a number gets a tick once it has the right number of lamps. When you think every cell is lit, press Check: Lightly tells you how many cells are wrong and how many lamps are still to place. Rooms are 6×6 and easy from Monday to Thursday, and 7×7 and medium from Friday to Sunday. Every room has exactly one answer, and you can reach it by logic alone, without guessing.
Solve it on your first check and you earn 12 points; later checks earn 10, 8, 6, 4 and then 2. If your sixth check isn't right, the day is over. Pressing Check before you've placed a lamp, or with nothing changed since your last check, never uses up a try. Stuck? The helper places one correct lamp for you, but it halves the day's score and is only available until your third check.
Your play streak counts the days in a row you've played, and your solved streak counts the days in a row you've solved the puzzle. Play seven days running and you earn a 7-point bonus, or 14 points if you solved all seven. Miss a day and the streaks start again. A new puzzle arrives every day at midnight UTC.
More puzzles: all Streakly games · how scoring, streaks and badges work