Durable LED Solar Powered Outdoor String Lights: 27 ft long string lights with 12 replaceable LED bulbs and detachable solar panel with on/off switch located on the back. 20'' between bulbs and 6' between the solar panel and first bulb. The lit portion is 20 feet long. LED bulbs last 20,000 hours and solar panel is rated at 1,000 charge lifespan (can last approximately 2.5 years). Direct sunlight is best for a full charge, though you can get some use from charging in indirect light. Commercial Grade WeatherProof Patio Lights with glass S14 Bulbs: Brightechs Ambience Pros hanging lights string has our own WeatherTite technology - withstood winds up to 50MPH, rain & snow. The bulbs are glass (NOTE, they are not shatterproof), with heat resistance up to 122 degrees Fahrenheit. Flexible heavy-duty cord withstands the wear of indoor and outdoor use.