The solar panel converts sunlight during the day to charge the battery, and it's environment-friendly. Intelligently identify daytime or night. Automatically lights up at dusk and turns off at dawn. Able to glow continuously up to 8-10 hours at night after being fully charged. Constructed from ABS and PS materials, it is durable, with IP65 waterproof rate, can be used for a long time. It's easy to install, no wiring needed. Just spike it into the soil and place the solar panel in the direction with effective sunlight. You can place the light wherever you want in outdoors, such as garden, lawn, pathway or areas where conventional electrical supply is not available. Power Color Temp Luminous flux B attery Type S olar Panel High Low 0 .5W Warm White (3000~3500K) 50lm 20lm 1.2V/1500MAH NI-MH Polycrystalline Silicon White (6500~7000K) 1 W Warm White (3000~3500K) 150lm 30~60lm 3.7V 18650/2200MAH Li-ion Polycrystalline Silicon White (6500~7000K) 2W Warm White (3000~3500K) 200lm 80~100lm 3.7V 18650/2200MAH Li-ion Polycrystalline Silicon White (6500~7000K) .