Misha Mansoor (born October 31, 1984), also known as Bulb after the name of his solo project, is an American guitarist, businessman, entrepreneur, composer, songwriter, and music producer, best known as the founder of and one of the three guitarists in the progressive metal band Periphery. Mansoor is also a part of the projects Haunted Shores and Four Seconds Ago, previously having been a part of the projects Of Man, Not of Machine and Snuggles. Mansoor is also involved with many entrepreneurial and business ventures, namely GetGood Drums, Horizon Devices, and 3DOT Recordings.

Mansoor is considered to be one of the forerunners of the djent movement and is often erroneously attributed with the invention of the word itself (whose invention he attributes to Meshuggah guitarist Fredrik Thordendal). With Periphery), Mansoor has recorded, produced, and released six studio albums, all to critical acclaim and commercial success. Mansoor is extremely influential in the world of guitar playing and has been named one of the Top 20 best guitarists of the 2010s by Guitar World magazine.