Best Outdoor String Lights: Brightech Ambience Pro Waterproof Solar LED Outdoor String Lights Level up your outdoor ambiance with these Brightech Ambience Pro - Waterproof Solar LED Outdoor String Lights ($30, originally $36). The 27-foot string lights produce a soft white, amber hue for the most romantic ambiance. The bulbs are shatterproof plastic shells, waterproof, and heat-resistant up to 122 degrees Fahrenheit. Image Source: amazon.com Brightech Ambience Pro - Waterproof Solar LED Outdoor String Lights $30 from amazon.com Buy Now