Light Up

Light Up is a grid-based puzzle game where the player must set down light bulbs on the correct blank squares, so that all blank squares are lit. A bulb lights up all squares in its row or column, all the way to where the light beam is blocked by a black square (bulbs cannot be placed on black squares). Some black squares have numbers which indicate how many bulbs need to be orthogonally adjacent to that square. No two bulbs can illuminate each other.