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A top hat (left) and barn doors (right) used in theatrical lighting. Barn doors are generally not used with "profile" or "ellipsoidal reflector" spotlights because they have internal shutters which work more effectively. Barn doors are not effective at shaping the light of a PAR lights and a narrower lens would be a better way to do this.
Storm door, Japan. A storm door is a type of door that is installed in front of an exterior access door to protect it from bad weather and allow ventilation.Storm doors generally have interchangeable glass panels and window screen panels to provide visibility and prevent flying insects from entering the home.
Storm windows can be made of glass, rigid plastic panels, or flexible plastic sheets; and may be permanently or temporarily mounted. They function similarly to insulated glazing . The term may also refer to a small openable flap found in the side window on light aircraft.
The origin of the glass chandelier is unclear, but some scholars believed that the first glass chandelier was made in 1673 in Orléans France, where a simple iron rod was encased in multi-coloured glass with glass arms attached. [47] By the turn of the 18th century, glass chandeliers were produced in France, England, Bohemia, and Venice. [47]
A garden solar lamp A child in Zambia studying by the light of a lamp charged by solar power during the day. A solar lamp, also known as a solar light or solar lantern, is a lighting system composed of an LED lamp, solar panels, battery, charge controller and there may also be an inverter.
Ball lightning is a possible source of legends that describe luminous balls, such as the mythological Anchimayen from Argentinean and Chilean Mapuche culture.. According to a statistical investigation carried out in 1960, of 1,962 Oak Ridge National Laboratory monthly role personnel, and of all 15,923 Union Carbide Nuclear Company personnel in Oak Ridge, found 5.6% and 3.1% respectively ...