Courtesy of Bed, Bath, & Beyond.
Want a better sleep for a low price? Blackout curtains are the way to go. SoundAsleep offers various styles of curtains that not only block out exterior street lights, but also reduce noise and save energy in your home with a Thermaback coating.

SoundAsleep Vivianna Grommet 84-Inch Room Darkening Window Curtain Panel in Slate, $34.99, Bed Bath & Beyond.