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The first Tensor lamp consisted of a 12-volt automobile parking light bulb and a reflector made from a kitchen measuring cup. Monroe fixed the cup to a metal tube that was attached to a transformer, which reduced 115-volt house current to 12 volts. Because of the small bulb, the entire lamp could be made smaller with a light-directing shade. [5]
The miniature 12-volt DC automotive-type #93 lightbulb utilized by Tensor, Lampette, and other designers of similar products, are smaller than the standard household 110/220-volt AC incandescent light bulb but produced more lumens in a smaller area, so that the lamp bulbs burn out at an increased rate. While standard bulbs last around 1,000 ...
Similar US bulb: HB2 (9003) 12V: ECE nominal luminous flux: 1,650 / 1,000 lm ±15% Available with P45t base to upgrade old headlamps designed for R2 bulb H7 1 12 V: 55 W 24 V: 70 W PX26d USA, Japan 12V: ECE nominal luminous flux: 1,500 lm ±10% H8 1 12 V: 35 W PGJ19-1 USA ECE nominal luminous flux: 800 lm ±15% H8B 1 12 V: 35 W PGJY19-1 USA H9 1
The bulb is halogen, which was previously mainly used in the automotive industry. [5] The Tizio is available in a variety of sizes and colours; the original, and most widely known, is the 50 (referring to the wattage of the bulb) in black. The mid-sized model is the 35, and there is the bedside-sized Micro (20 Watts).
With HMI bulbs, color temperature varies significantly with lamp age. A new bulb generally will output at a color temperature close to 15,000 K during its first few hours. As the bulb ages, the color temperature reaches its nominal value of around 5600 K or 6000 K. With age, the arc length becomes larger as more of the electrodes burn away.
Compact fluorescent mogul-base bulbs are also available, as are adaptors to allow medium-base bulbs to be used in mogul sockets. There are usually two three-way switches near the top of the floor lamp to operate the bulbs. One controls the three-way center bulb, and the other turns on one, two, or all three (or four) of the peripheral bulbs.
Most of the bulbs in circulation are reproductions of the wound filament bulbs made popular by Edison Electric Light Company at the turn of the 20th century. They are easily identified by the long and complicated windings of their internal filaments, and by the very warm-yellow glow of the light they produce (many of the bulbs emit light at a ...
In 2018, access of electricity in Ethiopia reached 45%, and power generation, especially hydropower, tripled in a decade from about 850 MW to above 2,000 MW. [ 12 ] [ 13 ] According to the World Bank , [ 14 ] power outage of Ethiopia occurred 8.2 times in a typical month, each average duration of 5.8 hours.