Lightbulb Sun is the sixth studio album by British progressive rock band Porcupine Tree, first released in July 2000, and later reissued in 2008 on CD, DVD-A surround sound, and vinyl.This album, along with their prior album Stupid Dream, are considered to have a more commercial, poppier sound, opposed to the abstract instrumental sound of their prior albums, or the heavier metal sound in their subsequent albums of the 2000s.