The New River Gorge Bridge in West Virginia. 876 feet. Thatâs the amount of vertical space that exists between The New River Gorge Bridge and the water. Below is a tribute to natureâs wonder. Above is a modern engineering miracle. Bridge Day celebrates both, and all the space between.
A skylight providing internal illumination. Daylighting is the practice of placing windows or other openings and reflective surfaces so that during the day natural light provides effective internal lighting. Particular attention is given to daylighting while designing a building when the aim is to maximize visual comfort or to reduce energy use.
The amount of visible light on the longest day of the year in the Northern Hemisphere. Day length refers to the period from sunrise to sunset. Civil twilight refers to the time before sunrise and after sunset when the sun is 6Âº or less below the horizon.