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2. Luminous efficacy - Wikipedia

   en.wikipedia.org/wiki/Luminous_efficacy

   Luminous efficacy can be normalized by the maximum possible luminous efficacy to a dimensionless quantity called luminous efficiency.The distinction between efficacy and efficiency is not always carefully maintained in published sources, so it is not uncommon to see "efficiencies" expressed in lumens per watt, or "efficacies" expressed as a percentage.

3. LCD projector - Wikipedia

   en.wikipedia.org/wiki/LCD_projector

   Powell, Evan (2002). "Epson's 730c: Best of Class in 2000-Lumen Portables", projectorcentral.com; Business Wire (2005). "Leading Projector Manufacturers Fujitsu, Hitachi, Panasonic, Sanyo and Sony Join Forces with Epson to Educate the Market about; Benefits of Three-Panel, Liquid Crystal Display Technology", projectorcentral.com Lawler, Richard ...

4. List of Panasonic video projectors - Wikipedia

   en.wikipedia.org/wiki/List_of_Panasonic_video...

   Lumens (ANSI) Contrast Light Source Display Method Inputs Notes PT-AE100 February 2002 858x484 16:9 200 in (508cm) 700 500:1 120W UHM Bulb 3LCD: Composite, S-Video, Component PT-AE200 February 2003 858x484 16:9 200 in (508cm) 700 700:1 120W UHM Bulb 3LCD: Composite, S-Video, Component, SCART PT-AE300 January 2003 960x540 16:9 200 in (508cm) 800 ...

5. Xenon arc lamp - Wikipedia

   en.wikipedia.org/wiki/Xenon_arc_lamp

   The white continuous light generated by the xenon arc is spectrally similar to daylight, but the lamp has a rather low efficacy in terms of lumens of visible light output per watt of input power. Today, almost all movie projectors in theaters employ these lamps, with power ratings ranging from 900 watts up to 12 kW.

6. List of CRT video projectors - Wikipedia

   en.wikipedia.org/wiki/List_of_CRT_video_projectors

   Two projectors mounted in a special pedestal allowing twice the brightness. One projector can converge on green. ... peak white 300 lumens, all white:260 lumens: VPH ...

7. Foot-lambert - Wikipedia

   en.wikipedia.org/wiki/Foot-lambert

   A foot-lambert or footlambert (fL, sometimes fl or ft-L) is a unit of luminance in United States customary units and some other unit systems. A foot-lambert equals 1/π or 0.3183 candela per square foot, or 3.426 candela per square meter (the corresponding SI unit).