The polysilicon solar panels on these lights have a 1.2 times conversion efficiency. They fully charge under sunshine in about 6 hours and once fully charged can work for 2-3 nights. They are equipped with a 2400mAh rechargeable lithium-ion battery, have 384 LEDs built-in, which makes them 2-3 times brighter than ordinary street lights, and come with a remote control. These lights have several modes (On, Mode 1, Mode 2, Mode 3, & SOS Mode in which the light sends out an SOS distress signal). The highly sensitive motion sensors can sense moving objects as far as16-33 feet with 270° degrees range. They have a high temperature resistance and IP65 waterproof. Installation is easy with the included screws.