Aootek Solar Lights 120 LEDs with Lights Reflector,270 Degree Wide Angle, IP65 Waterproof, Security Lights for Front Door, Yard, Garage, Deck (4pack) 4.5 out of 5 stars 27,252 $35.99 $ 35 . 99. Get Price. Solar Time, Angles, and Irradiance Calculator: User Manual. neath the sun. The solar azimuth angle (Φs) is the angle formed between the