The solution adopts 5.8G low-cost microwave radar module series,to realize the light-on when objects arrive in set sensing distance, and light-off according to the set delay time after the obejcts leaves(support dimming mode/PWM, light sensor controlling).The sensing effect is stable and reliable, not affected by dirt or environmental temperature, no need to add additional lenses.The product structure design need to do waterproof.There have another low-power solutions available for solar-powered garden lights.