The B Lydian scale has 7 notes: B – C♯ – D♯ – E♯ – F♯ – G♯ – A♯. Lydian is the major scale with a raised 4th. That ♯4 floats instead of resolving, giving a dreamy, magical sound loved by film composers. In Indian music it is Kalyan thaat, the scale of raga Yaman.
Compared with the B major scale it has ♯4 (E♯ instead of E).
The explorer above is set to B Lydian: the whole neck is mapped, and you can zoom into any of its 7 positions, change the labels to degrees or fingers, and hear it up, down and in patterns.