Photometric Performance of the Solar Bottle Bulb

Abstract

The solar bottle bulb has become a very important source of light in poor regions and/or in those that have difficult access to power. Its extended use results in the need to have a more rational knowledge of its performance. In this work, we carried out the photometry of the solar bottle bulb considering the sky models that simulate cloudy and sunny days with the sun at different angles. The results show a performance varying from 50 to 70%, according to the position of the bottle and the characteristics of solar radiation, together with a distribution of light that greatly improves the one given by a hole in the roof, thereby reducing up to 32 times its maximum intensity.