HYSapientia claims that 218 LEDs is the optimal number of lights, as it makes these motion sensors brighter and last longer at night. The light is waterproof and heat resistant and can operate in unpredictable weather conditions. After charging in sunlight for about 7 hours, it will stay off at night until the motion detector is activated. All screws required for installation are provided. The package also contains a small needle to activate the light before first use