Search results
Results from the WOW.Com Content Network
This concept was pioneered by Duro-Test in 1980 with a commercial product that produced 29.8 lm/W. [99] [100] More advanced reflectors based on interference filters or photonic crystals can theoretically result in higher efficiency, up to a limit of about 270 lm/W (40% of the maximum efficacy possible). [101]
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]
Since that move, the bulb has run continuously on an uninterruptible power supply; previously it had only been off the grid for short periods of time (e.g. a week in 1937 for a renovation and the odd power outage). [7] In 2001, the bulb's 100th birthday was celebrated with a community barbecue and live music. [7]
The company's main bowling center brands in the United States include the namesake Lucky Strike Lanes (which the then-Bowlero Corporation acquired in 2023) [5], Bowlero, the upscale Bowlmor Lanes, and the legacy AMF Bowling brand. The company's U.S. centers represent 7% of the country's 4,200 commercial bowling centers.
As of 2011, incandescent lighting was the most common type used in homes, delivering about 85% of household illumination. [2] To produce light, incandescent light bulbs convert electricity to heat, heating a filament to the point where it glows; a portion of the heat is thus converted to light.
While the Apple II, which was released in 1977, cost about $1,300 at the time of its launch, now it could fetch you over an estimated $6,600. ... 1972): $100 to $150. Asteroids (original arcade ...
The two filaments can be activated separately or together, giving three different amounts of light. One common 3-way incandescent bulb is the 50/100/150 W. It has a low-power 50 W filament and a medium-power 100 W filament. When they are both energized at the same time, 150 W of power is delivered, and a high level of light is produced.
Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!