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One of the first diameters of fluorescent lamps, with the 15W T8 and 30W T8 having been introduced in 1938. [3] The European energy-saving krypton T8 lamps were introduced by Thorn EMI during the 1970s. [4] The North American energy-saving argon T8 lamps weren't introduced until the 1980s. [5] T9 T29 1 + 1 ⁄ 8: 28.6 G10q quad-pin; G13 bi-pin
Nikola Tesla made similar experiments in the 1890s, devising high-frequency powered fluorescent bulbs that gave a bright greenish light, but as with Edison's devices, no commercial success was achieved. One of Edison's former employees created a gas-discharge lamp that achieved a measure of commercial success.
Standard fluorescent lighting comes in multiple form factors, including the T5, T8 and T12. The brightest version is the T5. The T8 and T12 are less powerful and are more suited to plants with lower light needs. High-output fluorescent lights produce twice as much light as standard fluorescent lights. A high-output fluorescent fixture has a ...
T5 High Output fluorescent bulbs which are thinner than traditional T8 bulbs and provide a much brighter, more powerful light are commonly used as are the older VHO (Very High Output) fluorescent tubes and compact fluorescent lighting. Another light source in reef aquariums is metal halide lighting. These high output lights closely recreate the ...
The typical response of human vision to light under daytime or bright conditions, as standardized by the CIE in 1924. The horizontal axis is wavelength in nanometers. [8] Luminous efficacy of radiation measures the fraction of electromagnetic power which is useful for lighting. It is obtained by dividing the luminous flux by the radiant flux. [4]
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 ...
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