The Lumalight is a 4" circular decal that mounts in the window of your vehicle. Back lit with LED lights it functions off of two sensors, one for light and one for motion. These sensors tell it to only light up at night when your vehicle is in motion and turn itself off two minutes after stopping. Tagged as "The World's Smartest Decal", the product was featured on the show "Shark Tank" as well as "Good Mourning America". Available with custom designs, it is perfect for branding your company or doing a great fundraiser for your school or organization. Also available with all major sports team's logos. NFL, MLB, NBA, NHL, NCAA and Military insignia.