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The body of light, sometimes called the 'astral body' [a] or the 'subtle body,' [b] is a "quasi material" [1] aspect of the human body, being neither solely physical nor solely spiritual, posited by a number of philosophers, and elaborated on according to various esoteric, occult, and mystical teachings.
A light fixture (US English), light fitting (UK English), or luminaire is an electrical lighting device containing one or more light sources, such as lamps, and all the accessory components required for its operation to provide illumination to the environment. [1] All light fixtures have a fixture body and one or more lamps.
Inside the Linac, electrons are focused and accelerated to form a beam of high-speed particles. Electrons emerging from the accelerator have energies up to 25 MeV and are moving at an appreciable fraction (95 – 99+ percent) of the speed of light (relativistic velocities). Lichtenberg figure captured in an acrylic block.
For lighting building interiors, it is often important to take into account the color temperature of illumination. A warmer (i.e., a lower color temperature) light is often used in public areas to promote relaxation, while a cooler (higher color temperature) light is used to enhance concentration, for example in schools and offices. [15]
To define light source color properties, the lighting industry predominantly relies on two metrics, correlated color temperature (CCT), commonly used as an indication of the apparent "warmth" or "coolness" of the light emitted by a source, and color rendering index (CRI), an indication of the light source's ability to make objects appear natural.
Light pollution experts abide by the mantra: “keep it low, keep it shielded, keep it long.” In other words, ensure that lighting is low to the ground, that it is targeted to avoid light ...