Tap a light to flip it and its horizontal and vertical neighbours.
THE PUZZLE COLLECTION / NERDANIA
LUMEN LOCK
One touch changes five lights. Work out the right combination to switch off the entire panel. Includes a 100-level campaign that gets harder every level.
PERSONAL BEST 0
Turn every light off to unlock the next panel.
The panels grow and the clock tightens. Every starting pattern is generated from legal switches.
