Lux Angelis - arr. Stephen Chin (String Orchestra Grade 4, 1.5 & 1)(Multi Level Strings and Percussion less advanced string parts and percussion are optional) Lux Angelis, "Light of the Angels", is an advanced string orchestra work that may be played with optional grade 1 strings, grade 2 strings, keyboard and percussion. The notion of light pervading the universe is, in the composer's opinion, both physical and personal. This is represented to some extent by the use of suspended chords and an abundance of harmonics.