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2. Fluorescent lamp - Wikipedia

   en.wikipedia.org/wiki/Fluorescent_lamp

   A fluorescent lamp, or fluorescent tube, is a low-pressure mercury-vapor gas-discharge lamp that uses fluorescence to produce visible light. An electric current in the gas excites mercury vapor, to produce ultraviolet and make a phosphor coating in the lamp glow.

3. Flat lens - Wikipedia

   en.wikipedia.org/wiki/Flat_lens

   The first, near-infrared, flat lens was announced in 2012 using nanostructured antennas. [2] It was followed in 2013 by an ultraviolet flat lens that used a bi-metallic sandwich. [3] In 2014 a flat lens was announced that combined composite metamaterials and transformation optics. The lens works over a broad frequency range. [6]

4. Wood's glass - Wikipedia

   en.wikipedia.org/wiki/Wood's_glass

   Two "black-light" ultraviolet fluorescent tubes. The glass envelopes illustrate the dark blue color of Wood's glass, although these modern tubes actually use another optical filtering material. Wood's glass is an optical filter glass invented in 1903 by American physicist Robert Williams Wood (1868–1955), which allows ultraviolet and infrared ...

5. List of light sculptures by Dan Flavin - Wikipedia

   en.wikipedia.org/wiki/List_of_light_sculptures...

   an artificial barrier of blue, red and blue fluorescent light (to Flavin Starbuck Judd) 1968 Red and blue fluorescent light Modular units, each made of two 2-foot (61 cm) vertical fixtures and two 4-foot (122 cm) horizontal fixtures; length variable 3 2 173 [148] an artificial barrier of green fluorescent light (to Trudie and Enno Develing)

6. Optical flat - Wikipedia

   en.wikipedia.org/wiki/Optical_flat

   Optical flats in case. About 2.5 centimetres (1 in) in diameter. The third flat from the left is standing on edge, showing the thickness. A λ/20 optical flat that has been coated with aluminum, making a first-surface mirror Two optical flats tested using 589 nm laser-light. At 2 inches (5.1 cm) in diameter and 0.5 inches (13 mm) thick, both ...

7. Compact fluorescent lamp - Wikipedia

   en.wikipedia.org/wiki/Compact_fluorescent_lamp

   The first fluorescent light bulb and fixture were displayed to the general public at the 1939 New York World's Fair. The spiral CFL was invented in 1976 by Edward E. Hammer, an engineer with General Electric, [7] in response to the 1973 oil crisis. [8] Although the design met its goals, it would have cost GE about $25 million to build new ...