Experience unparalleled energy efficiency with Solace™ Solar Festoon Lights that GLOW WITH 2X THE ALLURE of regular solar string lights ... GUARANTEED. Illuminate your evenings without the worry of rising electricity bills, embracing the sun's power for a brighter, cost-effective tomorrow. Our #1 priority here is your happiness. If you don't fall in love with your new lights after 90 nights, we will REFUND YOU 100% OF YOUR PURCHASE PRICE - no questions asked. Happiness guaranteed.