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Alternatively different coloured water based dyes were used in each layer, which slowly boiled producing pulsing vapour bubbles when exposed to the heat of the projector lamp with the heat filters removed. Consequently, randomly pulsing and moving blobs of colour were projected on the screen creating the light show.
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 ]
In 1980, the annual operating cost for the average incandescent lamp was $280; for mercury vapor lamps, it was $128; and for low-pressure sodium vapor lamps, it was $60 a year. [1] Meanwhile, high-pressure sodium vapor lamps cost only $44 a year to operate, with a standard life expectancy of 15,000 hours, which also helped to lower labor and ...
The 1960s brought us The Beatles, Bob Dylan, beehive hairstyles, the civil rights movement, ATMs, audio cassettes, the Flintstones, and some of the most iconic fashion ever. It was a time of ...
A Roman hanging lamp or chandelier. Hanging lighting devices, some described as chandeliers, were known since ancient times, and circular ceramic lamps with multiple points for wicks or candles were used in the Roman period. [11] [12] The Roman terms lychnuchus or lychnus, however, can refer to candlestick, floor lamps, candelabra, or ...
Lava lamps An original Mathmos Astro lava lamp A lava lamp is a decorative lamp , invented in 1963 by British entrepreneur Edward Craven Walker , the founder of the lighting company Mathmos . It consists of a bolus of a special coloured wax mixture inside a glass vessel, the remainder of which contains clear or translucent liquid.