Solar panel: 5V/18W, life: 25 years; Light source: 540LM, imported lamp beads, equivalent to traditional LED 10W brightness, life 50000hrs; Battery: 3.2V/13AH, lithium iron phosphate battery, life 8-12 years; Illumination: high brightness for the first 4 hours, intelligent power regulation after 4 hours. One screw to complete the installation