The teardrop faceted cut glass bulbs are optimized to give a vibrant sparkle effect. The 23' lighted length is strung on a green cord that is UL approved for indoor and outdoor use. There are 4" between each bulb, and you can connect up to 3 strands end-to-end to make the most out of your power outlets. Multi-color lights on a green cord Sparkling crystal lights 70 Count Super bright bulbs 70% Brighter than standard miniature bulbs Teardrop faceted cut glass bulbs Vibrant sparkle effect 23' Lighted length 4" Spacing between bulbs Connect up to 3 sets end-to-end (additional sets sold separately) Green cord UL listed for indoor and outdoor use End-to-end connections