Mr. Light Individual Hanging Color-Changing Solar Snowballs LED Light, Set of 4 Cloudy - Day Solar! Works even on cloudy days! Includes 3 AA rechargeable batteries & super-efficient solar panel. Easily hung with included hook from your rain gutter, or roof eave Cloudy-day solar works even on cloudy days Includes 3 aa rechargeable batteries and super-efficient solar panel Easily hung with included hook from your rain gutter, or roof eave