![]() ![]() The UV spectrum, thus, has effects both beneficial and harmful to life. However, ultraviolet light (specifically, UVB) is also responsible for the formation of vitamin D in most land vertebrates, including humans. More energetic, shorter-wavelength "extreme" UV below 121 nm ionizes air so strongly that it is absorbed before it reaches the ground. The amount of UV light produced by the Sun means that the Earth would not be able to sustain life on dry land if most of that light were not filtered out by the atmosphere. For humans, suntan and sunburn are familiar effects of exposure of the skin to UV light, along with an increased risk of skin cancer. ![]() Short-wave ultraviolet light damages DNA and sterilizes surfaces with which it comes into contact. These interactions can involve absorption or adjusting energy states in molecules, but do not necessarily involve heating. Many practical applications, including chemical and biological effects, derive from the way that UV radiation can interact with organic molecules. Although long-wavelength ultraviolet is not considered an ionizing radiation because its photons lack the energy to ionize atoms, it can cause chemical reactions and causes many substances to glow or fluoresce. It is also produced by electric arcs, Cherenkov radiation, and specialized lights, such as mercury-vapor lamps, tanning lamps, and black lights. ![]() UV radiation is present in sunlight, and constitutes about 10% of the total electromagnetic radiation output from the Sun. Ultraviolet ( UV) is a form of electromagnetic radiation with wavelength shorter than that of visible light, but longer than X-rays. ![]() Arc welders must wear eye protection and cover their skin to prevent photokeratitis and serious sunburn. Like styrene, they are available in multiple finishes and colors and are ready for use in a variety of commercial and residential locations.UV radiation is also produced by electric arcs. They offer an easy to use solution for all fluorescent lighting cover needs. The open cell design allows for free air circulation resulting in lower operating temperatures, which increases ballast life and improves lamp performance.Īcrylic lighting panels are an economical, lightweight, and much stronger than alternatives. Plastic egg crate louvers/diffusers provide visual comfort and lighting efficiency. We offer them in many different finishes and colors ready for use in commercial or residential locations including kitchen and bath fixtures, basements, office buildings, schools, garages and recreation rooms. Standard sizes fit most drop-in ceiling systems as well many standard fluorescent lighting fixtures. They offer a lightweight and easy to use solution for almost any fluorescent light cover need. Styrene lighting panels are the most economical type of plastic light diffuser on the market. Sizes: Standard sheet sizes are 23 3/4" x 47 3/4" (2' x 4' light panels) We carry up to a 50" x 100" sheet sizes (which must be cut for standard shipping rates). We stock clear and opal white styrene panels as well as variations in acrylic and polycarbonate material. Since no two lighting fixtures are the same, we can cut each and every panel to the exact size that is required. All are available for simple online purchase or pick up in our store. We offer a wide variety of high-quality lighting panels in stock sizes, oversize, completely custom sizes. Find ceiling lighting panels at ePlastics®. ![]()
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