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The most common type of floodlight was the metal-halide lamp, which emits a bright white light (typically 75–100 lumens/Watt). Sodium-vapor lamps are also commonly used for sporting events, as they have a very high lumen to watt ratio (typically 80–140 lumens/Watt), making them a cost-effective choice when certain lux levels must be provided. [4]
Halogen lamps made for 12 to 24 volt operation have good light outputs, and the very compact filaments are particularly beneficial for optical control (see picture). The ranges of multifaceted reflector "MR" lamps of 20–50 watts were originally conceived for the projection of 8 mm film, but are now widely used for display lighting and in the ...
By comparison, a 60-watt household incandescent lamp will produce about 900 lumens. The luminous efficacy or lumens produced per watt of input of flashlight bulbs varies over the approximate range of 8 to 22 lumens/watt, depending on the size of the bulb and the fill gas, with halogen-filled 12-volt lamps having the highest efficiency.
Eleven teenage boys in Illinois have been charged with several felonies for allegedly using an online dating app to lure unsuspecting men to meetups and beating them, police said. Ten 17-year-old ...
For the first time in a decade, rates of adult obesity in the United States have dropped, a new study has found.. The study followed nearly 17 million people, the majority of whom were in the 26 ...
Chris Zylka is facing felony charges and a warrant is out for his arrest after a violent interaction with police in Ohio.. Zylka, who is perhaps best known for his 11-month engagement to Paris ...
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