Logic Masters Deutschland e.V.

This puzzle was originally set in October 2022 for the Cracking the Cryptic Discord's monthly prompt of "Lights."

• Normal sudoku rules apply.
• Digits separated by a white dot must be consecutive.
• Place light bulbs (represented by the digits 8 and 9) according to the following rules:
• Light bulbs may be placed in any of the white squares.
• A number in a gray square shows how many light bulbs are next to it, vertically and horizontally.
• Each light bulb illuminates from bulb to gray square or outer frame in its row and column.
• Every white square must be illuminated and a light bulb can not illuminate another light bulb.

Solve in CTC or f-puzzles