daylight
American Heritage Dictionary:
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day·light
(dā'līt') 
n.
n.
- The light of day; sunlight.
- Daybreak.
- Daytime.
- Exposure to public notice: corrupt business practices that were finally brought into the daylight.
- Understanding or insight into what was formerly obscure: new evidence that gave the researchers some daylight into the matter.
- Sports. An opening, as between defensive players, especially one providing an opportunity for action: The running back found some daylight and gained six yards.
- daylights Slang. One's wits: "His adventurism had scared the daylights out of them" (Frederick Forsyth).
see daylight
- To make sufficient progress so that completion of a project seems possible.
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In addition to the idiom beginning with daylight, also see beat the living daylights out of; begin to see daylight; in broad daylight; let daylight through; scare out of one's wits (the living daylights out of).
Antonyms by Answers.com:
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daylight
n
Definition: light part of hours
Antonyms: darkness, evening, night, sunset
Word Tutor:
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daylight
IN BRIEF: n. - The time after sunrise and before sunset while it is light outside.
Cheerfulness keeps up a kind of daylight in the mind.
— Joseph Addison
LearnThatWord.com is a free vocabulary and spelling program where you only pay for results!
McGraw-Hill Dictionary of Aviation:
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daylight
The period of time during any day that begins with the morning civil twilight and ends with the evening civil twilight. Civil twilight is the period before sunrise and after sunset when the sun’s center is between 0° and 6° below the horizon.
Oxford Dictionary of Modern Slang:
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daylights
noun
noun
to beat, scare, etc. the (living) daylights out of (someone): to beat, scare (someone) severely. (1848 —) .
Illustrated London News I might have chuckled throughout 'The Suitor' if its chief actor did not happen to scare the living daylights out of me, as the current saying goes (1964).
[From obs. slang daylights eyes.]
noun
to beat, scare, etc. the (living) daylights out of (someone): to beat, scare (someone) severely. (1848 —) .
Illustrated London News I might have chuckled throughout 'The Suitor' if its chief actor did not happen to scare the living daylights out of me, as the current saying goes (1964).
[From obs. slang daylights eyes.]
| dawg, date rape, date | |
| de-pants, dead, dead duck |
Random House Word Menu:
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categories related to 'daylight'
- Cyclical Events - daylight: hours between sunrise and sunset
See crossword solutions for the clue Wikipedia on Answers.com:
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Daylight
For other uses, see Daylight (disambiguation).
Daylight or the light of day is the combination of all direct and indirect sunlight outdoors during the daytime. This includes direct sunlight, diffuse sky radiation, and (often) both of these reflected from the Earth and terrestrial objects. Sunlight scattered or reflected from objects in outer space (that is, beyond the Earth's atmosphere) is generally not considered daylight. Thus, moonlight is never considered daylight, despite being "indirect sunlight". Daytime is the period of time each day when daylight occurs.
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Definition
Daylight is present at a particular location, to some degree, whenever the sun is above the horizon at that location. (This is true for slightly more than 50% of the Earth at any given time. For an explanation of why it is not exactly half, see here). However, the outdoor illuminance can vary from 120,000 lux for direct sunlight at noon, which may cause eye pain, to less than 5 lux for thick storm clouds with the sun at the horizon (even <1 lux for the most extreme case), which may make shadows from distant street lights visible. It may be darker under unusual circumstances such as a solar eclipse or very high levels of atmospheric smoke (See New England's Dark Day), dust,[1] or volcanic ash.[2]
Daylight intensity in different conditions
| Illuminance | Example |
|---|---|
| 120,000 lux | Brightest sunlight |
| 110,000 lux | Bright sunlight |
| 20,000 lux | Shade illuminated by entire clear blue sky, midday |
| 10,000 - 25,000 lux | Typical overcast day, midday |
| <200 lux | Extreme of darkest storm clouds, midday |
| 400 lux | Sunrise or sunset on a clear day (ambient illumination). |
| 40 lux | Fully overcast, sunset/sunrise |
| <1 lux | Extreme of darkest storm clouds, sunset/rise |
For comparison, nighttime illuminance levels are:
| Illuminance | Example |
|---|---|
| <1 lux | Moonlight[3] |
| 0.25 lux | Full Moon on a clear night[4][5] |
| 0.01 lux | Quarter Moon |
| 0.002 lux | Starlight clear moonless night sky including airglow[4] |
| 0.0002 lux | Starlight clear moonless night sky excluding airglow[4] |
| 0.00014 lux | Venus at brightest[4] |
| 0.0001 lux | Starlight overcast moonless night sky[4] |
For a table of approximate daylight intensity in the Solar System, see sunlight.
Effects
 |
This section does not cite any references or sources. Please help improve this section by adding citations to reliable sources. Unsourced material may be challenged and removed. (October 2008) |
Daylight is widely accepted to have a positive psychological effect on the human being,[citation needed] and consequently more cases of mental health problems are registered during the winter months than during the summer months due to the shortened periods of daylight.[citation needed] Cases of depression specifically linked to limited daylight are referred to as seasonal affective disorder.
Daylighting is lighting an indoor space with openings such as windows and skylights that allow daylight into the building. This type of lighting is chosen to save energy, to avoid hypothesized adverse health effects of over-illumination by artificial light, and also for aesthetics. The amount of daylight received into an indoor space or room is defined as a daylight factor, being the ratio between the measured internal and external light levels. Artificial lighting energy use can be reduced by simply installing fewer electric lights because daylight is present, or by dimming/switching electric lights automatically in response to the presence of daylight, a process known as daylight harvesting.
In recent years, work has taken place to recreate the effects of daylight artificially. This is however expensive in terms of both equipment and energy consumption and is applied almost exclusively in specialist areas such as filmmaking, where light of such intensity is required anyway. In some filmmaking locations, such as Sweden, there is too much light due to long summer days. As a result, in films like Marianne, night scenes have to be shot during the daylight hours and digitally altered later.
See also
Notes
- ^ http://www.perryton.com/black.htm
- ^ http://volcanoes.usgs.gov/ash/
- ^ Bunning, Erwin; and Moser, Ilse (April 1969). "Interference of moonlight with the photoperiodic measurement of time by plants, and their adaptive reaction" (– Scholar search). Proceedings of the National Academy of Sciences of the United States of America 62 (4): 1018–1022. Bibcode 1969PNAS...62.1018B. doi:10.1073/pnas.62.4.1018. PMC 223607. PMID 16591742. http://www.pnas.org/cgi/reprint/623/4/1018. Retrieved 2006-11-10.[dead link]
- ^ a b c d e Paul Schlyter, Radiometry and photometry in astronomy FAQ (2006)
- ^ "Petzl reference system for lighting performance". Archived from the original on 2008-06-20. http://web.archive.org/web/20080620123040/http://en.petzl.com/petzl/frontoffice/Lampes/static/referentiel/present_referentiel_en.jsp. Retrieved 2007-04-24.
External links
- Royal Institution of Chartered Surveyors - Rights to Light Determination Homepage
- Daylight Chart shows sunrise and sunset times in a chart, for any location in the world.
- http://www.gandraxa.com/length_of_day.xml Deriving the formulas to calculate the length of day.
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This entry is from Wikipedia, the leading user-contributed encyclopedia. It may not have been reviewed by professional editors (see full disclaimer)
Translations:
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Daylight
Dansk (Danish)
n. - dagslys, åbenhed, åbent vand
idioms:
- daylight robbery optrækkeri
- daylight saving time sommertid
- daylight time de lyse timer
Nederlands (Dutch)
daglicht, dageraad
Français (French)
n. - jour, lumière du jour, phares de jour, au grand jour
idioms:
- daylight robbery (GB) (être) du vol caractérisé, (être) de l'arnaque
- daylight saving time (GB) heure d'été
- daylight time pendant la journée
Deutsch (German)
n. - Tageslicht
idioms:
- daylight robbery (ugs.) Wucher
- daylight saving time Sommerzeit
- daylight time Sommerzeit
Ελληνική (Greek)
n. - φως της μέρας, χάραμα, χαραυγή
idioms:
- daylight robbery (καθομ.) αισχροκέρδεια (κν. χαράτσωμα, καθαρή ληστεία)
- daylight saving time θερινή ώρα
- daylight time (ΗΠΑ) θερινή ώρα
Italiano (Italian)
sensi, luce del giorno
idioms:
- daylight robbery furto alla luce del giorno
- daylight saving time ora legale
- daylight time ora legale
- in broad daylight in pieno giorno
- knock the daylights out of dar botte da orbi a
Português (Portuguese)
n. - luz (f) do dia
idioms:
- daylight robbery assalto (f) à luz do dia
- daylight saving time horário (m) de verão
- daylight time período (m) diurno
- in broad daylight em plena luz do dia
- knock the daylights out of apavorar
Русский (Russian)
свет, дневное время
idioms:
- daylight robbery ограбление средь бела дня
- daylight saving time летнее/зимнее время
- daylight time летнее время
- in broad daylight средь бела дня
- knock the daylights out of вышибить дух из кого-либо
Español (Spanish)
n. - luz del día, amanecer, conciencia pública, período del luz solar, espacio entre dos partes que debían estar juntas
idioms:
- daylight robbery robo, robo a mano armada, extorsión
- daylight saving time horario de verano, generalmente retrasando el reloj una hora
- daylight time hora de verano
Svenska (Swedish)
n. - dagsljus, gryning
中文（简体）(Chinese (Simplified))
白昼, 破晓, 日光
idioms:
- daylight robbery 明目张胆的劫夺
- daylight saving time 夏令时间, 日光节约时间
- daylight time 白天
中文（繁體）(Chinese (Traditional))
n. - 白晝, 破曉, 日光
idioms:
- daylight robbery 明目張膽的劫奪
- daylight saving time 夏令時間, 日光節約時間
- daylight time 白天
한국어 (Korean)
n. - 낮, 햇빛, (분명히 드러나는) 틈, 시력
日本語 (Japanese)
n. - 日光, 昼間, 夜明け, 知れわたること, 知識
v. - 日光をあてる
idioms:
- daylight robbery 公然の泥棒行為, 法外な代金
- daylight saving time 夏時間
- daylight time 日光節約時間, 夏時間
العربيه (Arabic)
(الاسم) ضو النهار, وضح النهار
עברית (Hebrew)
n. - אור היום, פתיחות, פומביות, שחר, בינה, שכל, רווח נראה לעין בין סירות מתחרות
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The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.
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The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Company. All rights reserved.
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