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2. Luminous efficacy - Wikipedia

   en.wikipedia.org/wiki/Luminous_efficacy

   The former sense is sometimes called luminous efficacy of radiation, [4] and the latter luminous efficacy of a light source [5] or overall luminous efficacy. [ 6 ] [ 7 ] Not all wavelengths of light are equally visible, or equally effective at stimulating human vision, due to the spectral sensitivity of the human eye ; radiation in the infrared ...

3. Helmholtz–Kohlrausch effect - Wikipedia

   en.wikipedia.org/wiki/Helmholtz–Kohlrausch_effect

   The difference between brightness and lightness is that the brightness is the intensity of the object independent of the light source. Lightness is the brightness of the object in respect to the light reflecting on it. This is important because the Helmholtz–Kohlrausch effect is a measure of the ratio between the two. [3]

4. LED lamp - Wikipedia

   en.wikipedia.org/wiki/LED_lamp

   A 230-volt LED filament lamp, with an E27 base. The filaments are visible as the eight yellow vertical lines. An assortment of LED lamps commercially available in 2010: floodlight fixtures (left), reading light (center), household lamps (center right and bottom), and low-power accent light (right) applications An 80W Chips on board (COB) LED module from an industrial light luminaire, thermally ...

5. List of automotive light bulb types - Wikipedia

   en.wikipedia.org/wiki/List_of_automotive_light...

   Mercury-free Integral ignitor For reflector systems D3S PK32d-5 42 V / 35 W Mercury-free Integral ignitor For projector systems D4R P32d-6 42 V / 35 W Mercury-free For reflector systems D4S P32d-5 42 V / 35 W Mercury-free For projector systems D5S PK32d-[7] 12 V: 25 W Ballast output voltage D6S P32d-1 42 V: 25 W D7S PK32d-1 42 V: 25 W D8S PK32d-1

6. Luminous flux - Wikipedia

   en.wikipedia.org/wiki/Luminous_flux

   Luminous flux is often used as an objective measure of the useful light emitted by a light source, and is typically reported on the packaging for light bulbs, although it is not always prominent. Consumers commonly compare the luminous flux of different light bulbs since it provides an estimate of the apparent amount of light the bulb will ...

7. What is the difference between LED, QLED and OLED?

   www.aol.com/difference-between-led-qled-oled...

   These sets are generally a step-up in colour quality compared to standard LED TVs – placing a “quantum dot” layer between the backlight and the screen to filter the light in a way that ...