The Pentatonic scale is much the same as the Lydian except it uses 5 tones rather than eight for each key.  This form employs normally only two fretted note combinations per string. The pentatonic scale is one of the oldest and was based upon a 5-note scale, a lot of old songs can be played entirely on the piano’s black keys with this format.

Also Known as the Blues/Jazz scale, very handy when adlibbing, watch the root center changes associated with the lose of three notes per scale or key.

This scale is nearly identical to the Lydian system except for the 3 missing tones on each string.  This system operates the same with regards to the overlapping of the 5 forms to create a full fret board length scale.  It is also comprised of the same root chord forms and key locations. And again, position of the form determines the key in play.