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In the 1970s, Thorn Lighting introduced an energy-saving 8 ft retrofit tube in Europe. Designed to run on the existing 125 W (240 V) series ballast but with a different gas fill and operating voltage, the tube operated at only 100 W. Increased efficiency meant that the tube produced only 9% lumen reduction for a 20% power reduction. [ 7 ]
EN70 – 20 mA avg, 100 mA peak, Subminiature, gas-filled, indirectly heated tetrode thyratron with negative control characteristic, 8-pin all-glass wire-ended EN91 /2D21 ( PL21 , PL2D21 , CV797 ) – 100 mA avg , 500 mA peak , 10 A surge , Gas-filled, indirectly heated tetrode thyratron, negative starter voltage, miniature 7-pin base, for ...
The company subsequently incorporated as Vari-Lite Inc. [8] and struck distribution deals to introduce the product into international markets. [citation needed]The Series 200 system launched in 1987, featuring the Artisan Control Console and two new luminaires: the VL2—a direct descendant of the VL1—and the VL3, based on the VL-Zero.
Until the B-52 became operational, the B-36 was the only means of delivering the first generation Mark 17 hydrogen bomb, [29] 25 ft (7.6 m) long, 5 ft (1.5 m) in diameter, and weighing 42,000 lb (19,000 kg), the heaviest and bulkiest American aerial nuclear bomb. The Mark 17 took up the aircraft's two aft bomb bays, while the forward bay could ...
The Sigma 18-50mm f / 2.8 EX DC Macro is a wide to normal angle, zoom lens made by the Sigma Corporation.. The lens is produced in Canon EF mount, Four Thirds System, Nikon F-mount, Pentax K mount, the SA mount, and the Sony/Minolta AF Mount varieties, all have the same optical formula.