Solar Ground Lights,Garden Pathway Outdoor In-Ground Lights With 8 LED(4 PACK)HIGHER POWER EFFICIENCY: high power efficiency, the energy conversion rate can be up to 14%. LIGHT SENSOR: integrated light sensor, it will automatically turn on in darkness or at night, and turn off when in daytime or bright area. LONG WORKING TIME: with 8pcs LEDs its brightness is up to 40lm, built in 600mAh rechargeable battery, it only needs 6 8 hours to be fully charged and can last for 8 10 hours working time. PROTECTION DESIGN: external