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Ultraviolet ( UV) designates a band of the electromagnetic spectrum with wavelength from 10 nm to 400 nm, shorter than that of visible light but longer than X- rays. UV radiation is present in sunlight, and contributes about 10% of the total light output of the Sun. It is also produced by electric arcs and specialized lights, such as mercury- vapor lamps, tanning lamps, and black lights. The S2 Pro LED Light offers an incredible 2, 450 lumens out of a tiny 3” x 2” housing; the S2 Pro is quite literally the brightest LED light ounce for ounce on the market. In physical cosmology, galaxy filaments ( subtypes: supercluster complexes, galaxy walls, and galaxy sheets) are the largest known structures in the universe. They are massive, thread- like formations, with a typical length of 50 to 80 megaparsecs h − to 261 million light- years) that form the boundaries between large voids in the universe.
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Filaments consist of gravitationally bound galaxies. Designed with three black curved arms, this ceiling light fitting features three shiny glass spheres which change colour when the light is switched on.