1. Solar power, underground light 2. White,Blue,Green,Red 3. Several sizes 4 ... charge.Usage: led street light, solar garden light, led underground light, Christmas light, outdoor lighting, led lawn light, led solar paver light, party, square, park, ... itself ! (LED light,solar light,led street light,led road lamp,solar road light,solar garden light,solar panel light,led grow light,outdoor lighting)