With Brightech's Ambience Pro Solar String Lights, you can easily create the perfect backyard atmosphere. Whether you're looking to add some simple ambiance or want to recreate a nostalgic backyard retreat, these lights are perfect for the job. Set the mood with amber incandescent string lights that are energy efficient, safe to use and fully weatherproofed for indoor or outdoor display. The built-in photocell senses light & darkness, turning them on automatically at dusk so that you can enjoy beautiful outdoor lights.