Key Specifications/Special Features: ?Solar energy courtyard light absorbs solar energy through solar panel and then turns solar energy into electric energy ?Solar courtyard light has all the advantages of solar system; no pollution, no noise, no cable distribution, environment sign in residence areas and art in yard. ?Specifications: o Solar Cell Type: Mono/Polycrystalline o Solar Power: 20W o Light Source Type: 9W energy-saving lamp o Light Source Color: White o Surface Material: steel o Battery Type: Sealed Lead-acid Battery o Operation Time: UP 10 hours