Cazador-del-sol  high quality acrylic coaster set of four assorted colors 4 inch diameter. Same high quality material that the indoor and outdoor Cazador-del-sol  suncatchers are made from and imported from Germany. Radiant vibrant colors are one each  Red, Green, Yellow, Blue.Sunrise to Sunset the edges of the coasters glow similar to a neon or fluorescent glow look. For use inside and outside the home. They glow during cloudy days, rainy days, snowy days, and days that the sun is behind the clouds. How does it work?  The moment of sunrise there are UV rays that penetrate all types of weather and this is what powers the edges of the coasters to glow. Actually  they look best on a cloudy, snowy, or rainy day because they show up better in the twilight hours. Once the sun sets the edges stop glowing until the next morning. Designed to protect your surfaces from water rings & condensation. Just like garden & patio products the coasters exhibit a mesmerizing glow from sunrise to sunset.  Your guests will be amazed as they watch these coasters exhibit a mesmerizing glow from sunrise to sunset. Bring a touch of modern  beauty and magic into any setting with these luminous 4" diameter coasters .