Verilux VA04BB1 Rise Shine Natural Sleep System Verilux's Natural Sleep System helps guide the body's internal circadian rhythms that regulate normal sleeping and waking. The System provides soothing and effective sleep and wakeup programs to help you fall asleep easily and wake naturally relaxed and rejuvenated. Advanced electronics offer an unlimited range of choices that include internal and external light sources combined with natural sounds, therapeutic programs, your favorite MP3 music or FM radio. The System progressively dims or brightens the lights while simultaneously decreasing or increasing the sound to create revitalizing, natural and effective sleeping and waking programs.