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2. List of optical illusions - Wikipedia

   en.wikipedia.org/wiki/List_of_optical_illusions

   Any kind of grid that deceives a person's vision. The two most common types of grid illusions are the Hermann grid illusion (1870) and the scintillating grid illusion (1994). The first is characterized by "ghostlike" grey blobs perceived at the intersections of a white (or light-colored) grid on a black background.

3. Category:Types of lamp - Wikipedia

   en.wikipedia.org/wiki/Category:Types_of_lamp

   Anarâškielâ; العربية; Azərbaycanca; বাংলা; Беларуская (тарашкевіца) Català; Cymraeg; Dansk; Deutsch; Ελληνικά

4. Blacklight - Wikipedia

   en.wikipedia.org/wiki/Blacklight

   A blacklight, also called a UV-A light, Wood's lamp, or ultraviolet light, is a lamp that emits long-wave ultraviolet light and very little visible light. [ 1 ] [ 2 ] [ 3 ] One type of lamp has a violet filter material, either on the bulb or in a separate glass filter in the lamp housing, which blocks most visible light and allows through UV ...

5. Lighting - Wikipedia

   en.wikipedia.org/wiki/Lighting

   A torchère is an uplight intended for ambient lighting. It is typically a floor lamp but may be wall-mounted like a sconce. Further interior light fixtures include chandeliers, pendant lights, ceiling fans with lights, close-to-ceiling or flush lights, and various types of lamps [15]

6. List of types of lighting - Wikipedia

   en.wikipedia.org/wiki/List_of_types_of_lighting

   Lighting is the deliberate use of light to achieve a practical or aesthetic effect.. Types of lighting include: Christmas lighting; Automotive lighting. Emergency vehicle lighting

7. Safelight - Wikipedia

   en.wikipedia.org/wiki/Safelight

   An amber (light brown) safelight for use with certain black-and-white photographic papers. A safelight is a light source suitable for use in a photographic darkroom. It provides illumination only from parts of the visible spectrum to which the photographic material in use is nearly, or completely insensitive.