Complex sentence: The band had one more Top 20 hit, "Turn-Down Day" later in 1966, They recorded a second album, Neon, in 1967 and followed that with various singles, then disbanded in 1968.
Split into simpler sentences: The band had one more Top 20 hit, "Turn-Down Day" later in 1966. They followed that with various singles, then disbanded in 1968.