• Total darkness
    Total darkness
  • Just the right amount of light
    Just the right amount of light
  • Total silence
    Total silence
  • Just the right amount of noise
    Just the right amount of noise
  • Bed quality
    Bed quality
  • What's going on in my brain
    What's going on in my brain
  • I'll describe my perfect sleeping environment in the comments
    I'll describe my perfect sleeping environment in the comments
435 votes