PeerPuzzles
Light Up
Place bulbs until every white square is lit.
A bulb lights its row and column, until a black square stops it.
No bulb may shine on another bulb.
A number says how many bulbs touch its black square, side by side.
Tap a square to cycle it: bulb, dot (no bulb), plain.
Progress can't be saved in this browser (private browsing, or site data blocked), so solved levels won't be ticked off.
Free play: a new random puzzle
To install: tap Share, then Add to Home Screen.