1. As the light is solar powered,it is connected closely with weather,angle and strength of sunlight.Recommended to use Mode 2 on remote for energy saving during fall or winter and cloudy periods 2. The battery lifetime is more than 5 years ,do not out the battery in the fire to avoid explosion 3. Please keep the solar panel clean,because the lamp is charged by the solar panel,It is recommended to clean solar panels every 3 months for easy and fast charging