You cannot use a solar spotlight inside your house because it is designed and built to perform outdoors. It uses a solar panel and a battery to charge up and perform. It has an automatic turn-on/off feature that works with the sunlight. Also, a few solar lights have motion sensors that detect the movement of objects and light up to alert the house owners. This obviously is not a feature for indoors. All of these specialties indicate that it is not feasible to use a solar spotlight inside a house.