Note: - There was an error in the puzzle as it had two solutions, but it is fixed now, slight modification has been done by adding a black cell at r3c4. Thanks to Otto Janko for notifying it.
Difficulty : Easy
It is known as Akari Puzzle / Light up / Bulb . Click on the name for rules. This is my first puzzle on this type. It is definitely of easy level. Next time it will not be as simple as this one. Njoy!! :)