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2012: Mini Maglite AA Pro 215 Lumens and Mini Maglite AA Pro+ 245 Lumens. 2012: Maglite 2D pro 274 Lumens with a Cree XP-G rather than a Cree XP-E, increasing brightness while decreasing beam distance efficiency. 2012: Maglite Mag-Tac flashlight plain bezel, 310 Lumens, low mode at around 100 Lumens. First Maglite flashlight to use CR123A ...
Factor ()Multiple Value Item 0 0 lux 0 lux Absolute darkness 10 −4: 100 microlux 100 microlux: Starlight overcast moonless night sky [1]: 140 microlux: Venus at brightest [1]: 200 microlux
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 household incandescent lamp will produce about 900 lumens.
That year, only 384 of New York City's 5,660 street lamps were gaslights. [1] Chicago turned on its first hundred-odd gaslights on September 4, 1850. [6] Gas light was up to ten times brighter than light from oil lamps, [1] but by present-day standards, the lights appeared "distinctly yellow and not very bright". [6]
about 400,000 times as bright as mean full Moon −25.60: star Sun: seen from Mars at aphelion: −25.00: Minimum brightness that causes the typical eye slight pain to look at: −23.00: star Sun: seen from Jupiter at aphelion −21.70: star Sun: seen from Saturn at aphelion −21.00: star Sun: seen from Earth on an overcast midday measuring ...
If a lamp has a 1 lumen bulb and the optics of the lamp are set up to focus the light evenly into a 1 steradian beam, then the beam would have a luminous intensity of 1 candela. If the optics were changed to concentrate the beam into 1/2 steradian then the source would have a luminous intensity of 2 candela.
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