Place light bulbs so that every white square is lit.
The rules
A bulb lights its own square and shines up, down, left and right until it hits a black square or the edge.
Two bulbs can never shine on each other.
A number on a black square says exactly how many bulbs touch it on its four sides (not diagonally). Black squares without numbers can have any number of bulbs next to them.
There is only one correct answer.
How to play
Tap a white square once for a bulb, twice for a dot (a reminder that no bulb goes there), and a third time to clear it.
Bulbs that shine on each other turn red. A number turns gray when it has the right count of bulbs.
Light every square correctly to earn today’s green check.
Tip: a 4 always has bulbs on all four sides, and a 0 never has any. Start there.