This package can be used for lighting up one study room or a suitable open area of farm house with the help of 01 LED bulb with 5m wire .In day time charge with solar panel provided and in evening use the lights as per your need. No need of electric supply. You can charge your mobile with USB point provided.( Cable not included).Main control unit can be freely put on floor.If sun is not available in rainy days then battery can be charged with suitable electric adopter.There are 3 spare light socket provided but user should use as per requirement because more the load, lesser the backup time of battery. Battery is with BMS(battery management system) for extended life ..