Diffuse sky radiation—solar radiation reaching the earth's surface after having been scattered from the direct solar beam by molecules or suspensoids in the atmosphere
Skylight is glazing having a slope less than 60 degrees from the horizontal with conditioned space below, except for purposes of complying with Section 151 (f), where a skylight is having a slope not exceeding 4 76 degrees (1: 12) from the horizontal
A skylight is a window in a roof. a window in the roof of a building. Roof opening covered with translucent or transparent glass or plastic designed to admit daylight. Skylights have found wide application admitting steady, even light in industrial, commercial, and residential buildings, especially those with a northern orientation. Installations range from purely functional daylighting to elaborate aesthetic forms. Flat-roofed buildings may have domed skylights; in others the skylight follows the slope of the roof. Often the skylight, or a portion of it, functions as an operating window to admit air
An opening or roof accessory in a roof or ceiling for admitting light If it bears across a joist, the top chord angles may be unbraced for design considerations
Diffuse sky radiation-solar radiation reaching the earths surface after having been scattered from the direct solar beam by molecules or suspensoids in the atmosphere