This type of lamp is solar energy. If you open the lamp after receiving the product and find that the lamp does not work, the product may have no electricity, please shine the sunlight for him before using Brightness: 3 lumens Size: 7.5x5x3.5cm Light color: warm white Material: ABS Light source power: 5 (W) Charging time: 4-5 hours Working time: full power on 8-10h Light source: a led lamp bead Protection level: IP65 Voltage: 1.2 (V) 4pcs(4 lamps + 4 stickers + 8 screws) 8pcs(8 lamps + 8 stickers + 16 screws) 12pcs(12 lamps + 12 stickers + 24 screws) 16pcs(16 lamps + 16 stickers + 32 screws) *[Automatic working mode] There is no switch for the solar ladder lamp, just pull out the insulator to use. On sunny days, it takes only 4-5 hours to fully charge. It can turn on automatically at dusk and turn off automatically at dawn. *[Easy installation] It can be fixed in any place that can be fixed with tape and screws. *[Wide use] Solar safety lights are very suitable for illuminating stairs, paths, gardens, decks, lighting front doors, backyards, driveways, garages, outdoor walls, etc.