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Poldina PRO Rechargeable LED Table Lamp. In the world of cordless lamps, this popular model is a classic. Available in a slew of colors, it works for both indoor and outdoor use, comes with a ...
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A miniature keychain lamp produces one or two lumens. A two-D-cell flashlight using a common prefocus-style miniature lamp produces on the order of 15 to 20 lumens of light [11] and a beam of about 200 candlepower. One popular make of rechargeable focusing flashlight uses a halogen lamp and produces 218 lumens. By comparison, a 60-watt ...
Aladdin Industries filed key "Aladdin Lamps" patents in 1954 and 1956, [1] [2] and commercial models were available by 1955. [3] However, due to low electrical efficiency and high price of the vacuum tube-based product, the concept was not popularized until later versions of the touch mechanism used integrated circuits and transistors to improve efficiency and reduce cost in the mid 1980s.
To measure the candlepower of a lamp, a person judged by eye the relative brightness of adjacent surfaces—one illuminated only by a standard lamp (or candle) and the other only by the lamp under test. They adjusted the distance of one of the lamps until the two surfaces appeared to be of equal brightness.
All of the above examples, such as the remote control, digital clock functions, and—in the case of adapters—no-load power, can be switched off just by switching off the power point. However, for some devices with a built-in internal battery, such as a phone, the standby functions can be stopped by removing the battery.
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