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A Tensor lamp is a trademarked brand of small high-intensity low-voltage desk lamp invented by Jay Monroe. [ 1 ] [ 2 ] The lamp was mainly popular during the 1960s and 1970s. [ 3 ] [ 4 ] The lamp was originally used by doctors and dentists, and later became more widely used. [ 5 ]
An open (single envelope) CFL [12] An encapsulated/closed (double envelope) CFL. Some fluorescent lamps emit ultraviolet radiation. [citation needed] The Health Protection Agency of the United Kingdom has conducted research concluding that exposure to open (single envelope) compact fluorescent lamps (CFLs) for over 1 hour per day at a distance of less than 30 cm can exceed guideline levels as ...
Due to Monroe's and Tensor's success in selling their original type of small high-intensity lamps, other companies began to design and sell similar types of lamps to the general public by 1963. [3] One of the primary competitors of the "Tensor Lamp" throughout the 60s was the Koch Creations "Lampette", which had a similar design and function.
A halogen lamp (also called tungsten halogen, quartz-halogen, and quartz iodine lamp) is an incandescent lamp consisting of a tungsten filament sealed in a compact transparent envelope that is filled with a mixture of an inert gas and a small amount of a halogen, such as iodine or bromine.
I've seen references to the fact that halogen lamps aren't very efficient. For example: "But like most conventional forms of domestic lighting, halogen spot lamps are terribly inefficient and use far more power than is necessary since nearly all the energy is wasted as heat, which brings with it the further problem that they run incredibly hot and often require fire-rated covers.
Like other gas-discharge lamps such as the very-similar mercury-vapor lamps, metal-halide lamps produce light by ionizing a mixture of gases in an electric arc.In a metal-halide lamp, the compact arc tube contains a mixture of argon or xenon, mercury, and a variety of metal halides, such as sodium iodide and scandium iodide. [7]