... no people or no car coming, the light is in low-light level , that can lighting for monitors, ... when people or car coming, the light will turn to high light level . 2.having a long lifespan ... with thinner power cables to save set- up cost.8. Use RoHS aluminum, fully solve the LED heat ... 30mm Induction lamp delay time 30s,60s,80s,180s ,light a litter or dark totally Correlated Color Temperature: ...