16w smart solar lamps, solar panel 35v/30w policristaline, po4 3.2v / 25Ah lithium batteries. Height suggested installation 4-5meters. Installation distance 15-20mtrs. Nichia japan LED hight power impact. 12hrs lighting, 6hrs full rest set by intelligent solar controller. Remote control to turn on & off, dim light or simply let lamp work by itself automatically. Use a 2inch pole to install to wall or pole. 3years warranty / 5/8years life time .