Introducing Glow in the Dark House Numbers by It Glows Inc.! Make your house stand out with our Glow in the Dark House Numbers Quick information about our Glow Numbers: * Size: ~6" (~15cm) * Powered by sunlight/daylight * DIY friendly * NO batteries or electricity required * 10+ hours glow after 15-20 mins exposure to daylight * Life: 20+ years * 100% non-toxic and non-radioactive * Day color: Off-white * Night time (Glow) color: Aqua Our unique Glow in the Dark House Numbers come in two colors, Aqua and Green, and are approximately 6 inches in size. Our product is perfect for those looking for an eye-catching, easy-to-read, and DIY-friendly house number.