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Description of the average spectral sensitivity of human visual perception of brightness
A luminous efficiency function or luminosity function represents the average spectral sensitivity of human visual perception of light. It is based on
Luminous_efficiency_function
How efficiently a source produces visible light
human eye. Luminous efficacy can be normalized by the maximum possible luminous efficacy to a dimensionless quantity called luminous efficiency. The distinction
Luminous_efficacy
Visible light per unit solid angle
angle, based on the luminosity function, a standardized model of the sensitivity of the human eye. The SI unit of luminous intensity is the candela (cd)
Luminous_intensity
SI unit of luminous intensity
spectrum, the contribution of each wavelength is weighted by the luminous efficiency function, the model of the sensitivity of the human eye to different wavelengths
Candela
Portion of the electromagnetic spectrum that is visible to the human eye
spectral sensitivity functions of the visual opsins. The range is defined psychometrically by the luminous efficiency function, which accounts for all
Visible_spectrum
Perceived luminous power
each wavelength with the luminosity function, which represents the eye's response to different wavelengths. The luminous flux is a weighted sum of the power
Luminous_flux
Color space defined by the CIE in 1931
matching function would be exactly equal to the photopic luminous efficiency function V(λ) for the "CIE standard photopic observer". The luminance function describes
CIE_1931_color_space
Ability to see in low light conditions
sensitivity function V(λ) which was defined in 1924. In 1951, the International Commission on Illumination (CIE) established the scotopic luminous efficiency function
Mesopic_vision
Ratiometric definition of luminance
related to the luminous flux density in a particular direction, which is radiant flux density weighted by the luminous efficiency function y ¯ ( λ ) {\displaystyle
Relative_luminance
Color space represented by the response of the three types of cones of the human eye
) {\displaystyle {\bar {y}}_{\text{F}}(\lambda )} CMF is the luminous efficiency function originally proposed by Sharpe et al. (2005), but then corrected
LMS_color_space
SI derived unit of illuminance
are defined using other luminous efficiency functions are also sometimes called "lux". For example, using the melanopic function describing melanopsin response
Lux
Perceived light energy
the luminous efficiency function, which represents the eye's sensitivity to different wavelengths of light. Luminous energy is the integrated luminous flux
Luminous_energy
to be more sensitive at lower wavelengths than the photopic luminous efficiency function that is based on sensitivity to cone receptors. The core region
Light effects on circadian rhythm
Light_effects_on_circadian_rhythm
Measurement of visible light
quantities (e.g., luminous flux) are related to their radiometric analogs (e.g., radiant flux) through standardized luminous efficiency functions that model
Photometry_(optics)
Effectiveness of a material in transmitting radiant energy
the filter V ( λ ) {\displaystyle V(\lambda )} is the luminous efficiency function The luminous transmittance is independent of the magnitude of the flux
Transmittance
Relative efficiency of detecting a signal as a function of its frequency or wavelength
responsivity, with units such as amperes per watt. Frequency response Luminous efficiency function Orthochromasia Matthew Luckiesh (1916). Light and shade and their
Spectral_sensitivity
Photoluminescent pigment
optimize (perceived) light emission, dictated by the human eye luminous efficiency function variance. Maximal light emission around wavelengths of 555 nm
Super-LumiNova
Frequency response curves used in sound pressure level measurement
quality measurement Headroom ITU-R 468 noise weighting LKFS Luminous efficiency function, the light equivalent M-weighting Noise Noise pollution Noise
A-weighting
Most common genetic condition leading to color blindness
often confuse red with black, while deutans do not. The protan luminous efficiency function is narrower at long wavelengths, which causes the reds to be
Congenital red–green color blindness
Congenital_red–green_color_blindness
Optical phenomenon
should be made with visible light according to CIE spectral luminous efficiency function V(λ) in the CIE 1931 standard observer and CIE standard illuminant
Haze_(optics)
Optical sighting device for firearms
preferred, to optimize light transmission dictated by the human eye luminous efficiency function variance. Maximal light transmission around wavelengths of 555 nm
Telescopic_sight
Topics referred to by the same term
measure of light, spectrally weighted per the Luminous efficiency function. Luminous efficiency function, in colorimetry, the curve which defines the visual
Luminosity_(disambiguation)
Luminous flux incident on a surface per area
wavelength-weighted by the luminosity function to correlate with human brightness perception. Similarly, luminous emittance is the luminous flux per unit area emitted
Illuminance
SI derived unit of visible light emission
thermal radiation (infrared). By contrast, luminous flux is weighted according to a model (a "luminosity function") of the human eye's sensitivity to various
Lumen_(unit)
Pair of telescopes mounted side-by-side
preferred, to optimize light transmission dictated by the human eye luminous efficiency function variance. Maximal light transmission around wavelengths of 555 nm
Binoculars
Electric light bulb with a resistively heated wire filament
watt (lm/W). The luminous efficiency of a source is defined as the ratio of its luminous efficacy to the maximum possible luminous efficacy, which is
Incandescent_light_bulb
Semiconductor light source
capability, and luminous efficacy. Often, higher efficiency means lower color rendering, presenting a trade-off between the luminous efficacy and color
Light-emitting_diode
International authority on light, illumination, colour, and colour spaces
defined by the spectral luminous efficiency function V(λ), followed in 1951 by the standard scotopic observer defined by the function V′(λ). Building on the
International Commission on Illumination
International_Commission_on_Illumination
Practical physics application
mechanisms can cause slow loss of efficiency of the device or sudden failure. The wavelength of the light emitted is a function of the band gap of the semiconductor
Light-emitting_diode_physics
Raised source of light beside a road or path
measurement systems were created to bridge the scotopic and photopic luminous efficiency functions, creating a Unified System of Photometry. These mesopic visual
Street_light
measurement of light (typically weighted by wavelength according to a luminous efficiency function), radiometry more broadly covers the measurement of optical radiation
List of file formats for luminaire radiometric data
List_of_file_formats_for_luminaire_radiometric_data
Electric light that produces light using LEDs
luminaire or close to thermal insulation. The term "efficiency droop" refers to the decrease in luminous efficacy of LEDs as the electric current increases
LED_lamp
2023 action role-playing video game
Forspoken is a 2023 action role-playing game developed by Luminous Productions and published by Square Enix. The game focuses on fast and fluid terrain
Forspoken
Hot, luminous star with a spectral type of A9 or earlier
Hypergiants absolute magni- tude (MV) A blue supergiant (BSG) is a hot, luminous star, often referred to as an OB supergiant. They are usually considered
Blue_supergiant
Range of light usable for photosynthesis
contexts, the reason PAR is preferred over other lighting metrics such as luminous flux and illuminance is that these measures are based on human perception
Photosynthetically active radiation
Photosynthetically_active_radiation
American color scientist (1900–1972)
subjects. In 1951, he proposed a modification of the CIE 1924 luminous efficiency function V(λ) below 460 nm that became known as Judd-modified V(λ), not
Deane_B._Judd
Physical quantity of hot and cold
efficiency in terms of temperature: For TC = 0 K the efficiency is 100% and that efficiency becomes greater than 100% below 0 K. Since an efficiency greater
Temperature
Observation of LED production efficiency
and amount of light per package, the publication also forecast that the luminous efficacy of LED-based lighting could reach 200 lm/W (lumen per watt) in
Haitz's_law
Type of electrodeless gas-discharge lamp
The "system efficiency" for a high-efficiency plasma lamp is given by the last three variables, that is, it excludes the luminaire efficiency. Though plasma
Plasma_lamp
Deliberate use of light to achieve practical or aesthetic effects
codes. An important property of light fixtures is the luminous efficacy or wall-plug efficiency, meaning the amount of usable light emanating from the
Lighting
Incandescent lamp variety
similar power and operating life; this also produces light with higher luminous efficacy and color temperature. The small size of halogen lamps permits
Halogen_lamp
Type of lamp
period. Luminous efficacy has reached even 150lm/w. Similarly to other retrofit light sources, a LED tube requires control gear to function. In general
LED_tube
Astrophysical phenomenon
A supernova (pl.: supernovae) is a powerful and luminous explosion of a star. A supernova occurs during the last evolutionary stages of a massive star
Supernova
Measure of illuminance for a combination of a camera's shutter speed and f-number
rather than the luminous exposure (aka photometric exposure), which is given by H = E t , {\displaystyle H=Et\,,} where H is the luminous/photometric exposure
Exposure_value
Program to adjust a display to reduce eye strain
but a 2018 study showed that changing the spectral composition of self-luminous displays without changing their brightness settings may be insufficient
F.lux
PMC 2572678. PMID 18765346. Stiles, W. S; Crawford, B. H (1933). "The Luminous Efficiency of Rays Entering the Eye Pupil at Different Points". Proceedings
Stiles–Crawford_effect
Skyscraper in Catalonia, Spain
nocturnal illumination. It has 4,500 LED devices that allow generation of luminous images on its façade. In addition, the outside of the tower has temperature
Torre_Glòries
"thirty-four billion solar mass black hole in SMSS J2157–3602, the most luminous known quasar", Monthly Notices of the Royal Astronomical Society, 496 (2):
List of most massive black holes
List_of_most_massive_black_holes
History of semiconductor light source
(e.g. during manufacturing), reduce heat generation and increase luminous efficiency. Sapphire substrate patterning can be carried out with nanoimprint
History_of_the_LED
Gravitational deflection of light
Observatories and Vahe Petrosian of Stanford University who discovered giant luminous arcs in a survey of galaxy clusters in the late 1970s. Lynds and Petrosian
Weak_gravitational_lensing
Portable hand-held electric light
60-watt household incandescent lamp will produce about 900 lumens. The luminous efficacy or lumens produced per watt of input of flashlight bulbs varies
Flashlight
LINER galaxy in the constellation Coma Berenices
doi:10.1086/588031 Imanishi, Masatoshi (2009-03-19). "LUMINOUS BURIED ACTIVE GALACTIC NUCLEI AS A FUNCTION OF GALAXY INFRARED LUMINOSITY REVEALED THROUGHSPITZERLOW-RESOLUTION
IRAS_F12032+1707
Illumination devices attached to bicycles
rider can see the way ahead. Serving the latter purposes require much more luminous flux and thus more power. Many jurisdictions require one or more bicycle
Bicycle_lighting
Blue-light toxicity
Schlangen, Luc; Lucas, Robert (August 2011). "A "Melanopic" Spectral Efficiency Function Predicts the Sensitivity of Melanopsin Photoreceptors to Polychromatic
Biological effects of high-energy visible light
Biological_effects_of_high-energy_visible_light
Excess artificial light in an environment
shielding, and the decreased skyglow impacts of yellow light preserve the luminous efficacy advantage of low-pressure sodium and result in most cases is less
Light_pollution
Intelligent network based lighting control
lighting technology designed for energy efficiency, convenience and security. This may include high efficiency fixtures and automated controls that make
Lighting_control_system
Measure of temperature relative to absolute zero
need to add a reason of requiring the function g(T) to be a monotonic function. The Carnot efficiency (efficiency of all reversible engines) may be a reason
Thermodynamic_temperature
Environmentally responsible construction principles
in harmony; green building technology focuses on low consumption, high efficiency, economy, environmental protection, integration and optimization. Leadership
Green_building
Galaxy in the constellation Canes Venatici
was discovered in Messier 51. The transient was later identified as a luminous red nova. The progenitor star was detected in archival Spitzer Space Telescope
Whirlpool_Galaxy
Group of early-class stars
nearby open star clusters. The massive stars within them are extremely luminous, up to 100,000 times brighter than the Sun, and frequently end their lives
OB_association
Fluorescent lamps with folded tubes, often with built-in ballast
the human eye. The luminous efficacy of lamps is the number of lumens emitted for each watt of electric power used. The luminous efficacy of a typical
Compact_fluorescent_lamp
Large self-illuminated object in space
A star is a luminous spheroid of plasma held together by self-gravity. The nearest star to Earth is the Sun. Many other stars are visible to the naked
Star
Light source using an electric arc through mercury vapor
Mercury-vapor lamps are more energy efficient than incandescent lamps with luminous efficacies of 35 to 55 lumens/watt. Their other advantages are a long bulb
Mercury-vapor_lamp
Luminous rings in the headlight assembly
placed in a circular pattern) are automotive front lighting units with luminous rings inside the headlight assembly. Introduced in 2000 by BMW, halos were
Halo_headlights
Galaxy undergoing an exceptionally high rate of star formation
their youth and small masses, their sSFR is high and comparable to GPs. Luminous infrared galaxies (LIRGs). These galaxies are by definition extremely dusty
Starburst_galaxy
Lamp using fluorescence to produce light
incandescent lamps, but are less efficient than most LED lamps. The typical luminous efficacy of fluorescent lamps is 50–100 lumens per watt, several times
Fluorescent_lamp
Production of syngas from coal
recover these valuable compounds. Blue water gas (BWG) burns with a non-luminous flame which makes it unsuitable for lighting purposes. Carburetted Water
Coal_gasification
Regulations banning sale of incandescent light bulbs
energy-efficient alternatives. The regulations are generally based on efficiency, rather than use of incandescent technology. In 2009, the European Union
Incandescent_light_bulb_ban
Optical system with resolution performance at the instrument's theoretical limit
with object's scattering potential—especially when looking at non-self-luminous (non-fluorescent) objects. To boost contrast, and sometimes to linearize
Diffraction-limited_system
State of matter
similar to lightning. With ample current density, the discharge forms a luminous arc, where the inter-electrode material (usually, a gas) undergoes various
Plasma_(physics)
Lamp mounted in the front of a vehicle
"quartz-halogen", "quartz-iodine", "iodine cycle", etc.) increases the effective luminous efficacy of a tungsten filament: when operating at a higher filament temperature
Headlamp
Shape and size of a digital camera's image sensor
the luminous flux per unit area. Thus for equal exposures, the signal to noise ratios of two different size sensors of equal quantum efficiency and pixel
Image_sensor_format
Electrical resonant transformer circuit invented by Nikola Tesla
streamers). The streamers look like a bluish 'haze' at the ends of the more luminous leaders. The streamers transfer charge between the leaders and toroid to
Tesla_coil
Chemical law
simpler molecules in a surrounding fizz zone. Energy is released in a luminous outer flame zone where the simpler gas molecules react to form conventional
Piobert's_law
Electromagnetic radiation generated by the thermal motion of particles
in which a heated body, naturally incapable of emitting light, becomes luminous, is called a state of incandescence. John E. Bowman (1856). An Introduction
Thermal_radiation
Device to reflect radiation back to its source
of luminous intensity, RI, is the measure of a reflector performance, which is defined as the ratio of the strength of the reflected light (luminous intensity)
Retroreflector
Personal timepiece
the war were specially designed for the rigors of trench warfare, with luminous dials and unbreakable glass. The UK War Office began issuing wristwatches
Watch
1945 scholarly article by economist Friedrich Hayek
2017 book, 50 Economics Classics. While calling the essay "powerful and luminous," economist George Stigler, in his Nobel Prize Lecture, stated that Hayek
The Use of Knowledge in Society
The_Use_of_Knowledge_in_Society
American scientist
This work led to the development of a measurement standard for CL luminous efficiency of phosphor powders and films. She partnered with GE Global Research
Lauren_Rohwer
Vehicle lights
beam headlight. The latter result suggests that a daytime running lamp's luminous area may have an important influence on its effectiveness. DRL power consumption
Daytime_running_lamp
bag heated to incandescence by a mostly non-luminous flame within, dramatically increased the efficiency of gas lighting. Acetylene was also used from
History of manufactured fuel gases
History_of_manufactured_fuel_gases
Earliest anatomically modern humans in Europe and West Asia
light skinned as an adaptation to better generate vitamin D from the less luminous sun farther north. However, of the three predominant genes responsible
Cro-Magnon
Counterillumination, a tactic used more by deep-sea dwellers, uses a luminous organ located in the bottom of the body to emit light in order to appear
Bio-inspired_photonics
Astrophysical limit on radiation from stars
hdl:2299/25784. ISSN 0004-637X. "NASA study helps explain limit-breaking ultra-luminous X-ray sources" (Press release). NASA / Jet Propulsion Laboratory (JPL)
Eddington_luminosity
Visual illusion in color images
chromostereopsis will ensue. Because most people have a point of maximum luminous efficiency that is off-center, the Stiles–Crawford effects generally will have
Chromostereopsis
List of galactic nuclei
Li; Chiara Mazzucchelli; Fabian Walter (24 June 2020). "Pōniuā'ena: A Luminous z = 7.5 Quasar Hosting a 1.5 Billion Solar Mass Black Hole". The Astrophysical
List_of_quasars
light output will exceed the decrease in power drawn, the energy efficiency - luminous efficacy - of the lighting will drop. However, other types of lighting
Voltage_optimisation
Class of light-emitting chemical compounds
though can cross-react to produce light with related enzymes from non-luminous species. The chemistry is unusual, as adenosine triphosphate (ATP) is required
Luciferin
Large permanent human settlement
sometimes benefiting different parties in the process, such as improving the efficiency of goods and service distribution. Historically, city dwellers have been
City
as dial painters, came into contact with luminous paint whose composition was similar to Radiomir, a luminous material invented in 1914 consisting of a
History of radiation protection
History_of_radiation_protection
"connectionism" which was contrasted with symbolic AI. Hinton called symbols the "luminous aether of AI"―that is, an unworkable and misleading model of intelligence
History of artificial intelligence
History_of_artificial_intelligence
Architectural lighting designer
for a conference on The Luminous Environment. The research ultimately became the text "An Approach to the Design of the Luminous Environment (1976)." He
William_M.C._Lam
Fauna found in deep-sea areas
are squeezed together. Fluidity in cell membranes increases efficiency of biological functions, most importantly the production of proteins, so organisms
Deep-sea_fish
Flash of gamma rays from a distant galaxy
electromagnetic emissions are second only to the Big Bang as the most energetic and luminous phenomena known. Gamma-ray bursts can last from a few milliseconds to several
Gamma-ray_burst
Use of light in the visible spectrum as a telecommunication medium
time. In other words, CSK transmission maintains a constant time-averaged luminous flux, even as its symbol sequence varies rapidly in chromaticity. Electric
Visible_light_communication
Protein that exhibits bright green fluorescence when exposed to ultraviolet light
purification and properties of aequorin, a bioluminescent protein from the luminous hydromedusan, Aequorea". Journal of Cellular and Comparative Physiology
Green_fluorescent_protein
Types of lamp
fill and operating voltage, the tube operated at only 100 W. Increased efficiency meant that the tube produced only 9% lumen reduction for a 20% power reduction
Fluorescent-lamp_formats
nanoparticle can also create a brightening effect by making skin radiant and luminous. Over the course of the treatment, gold nanoparticle can make the skin
Nanotechnology_in_cosmetics
terminology) Broadening function BH – (celestial object) Black hole BHB – (celestial object) Blue horizontal branch, a type of luminous star BHC – (celestial
List_of_astronomy_acronyms
Measure of a civilization's evolution
which the absolute magnitude is a function of the galaxies' rotational speed. Annis suggested that 75% of the least luminous objects (i.e., those with a decrease
Kardashev_scale
LUMINOUS EFFICIENCY-FUNCTION
LUMINOUS EFFICIENCY-FUNCTION
Boy/Male
Tamil
Anshumat | அஂஷà¯à®®à®¾à®¤Â
Luminous
Anshumat | அஂஷà¯à®®à®¾à®¤Â
Boy/Male
Hindu
Luminous
Boy/Male
Hindu, Indian, Marathi
Luminous
Boy/Male
Gujarati, Hindu, Indian, Kannada, Malayalam, Marathi, Telugu
Luminous
Boy/Male
Tamil
Luminous
Boy/Male
Tamil
Luminous
Boy/Male
Arabic, Muslim
Luminous
Girl/Female
Tamil
Dakshhtha | தகà¯à®·à®¾à®¹à®¤à®¾
Efficiency, Care
Dakshhtha | தகà¯à®·à®¾à®¹à®¤à®¾
Boy/Male
Tamil
Luminous
Boy/Male
Hindu, Indian
Luminous
Girl/Female
Latin
Luminous.
Girl/Female
Tamil
Luminous
Girl/Female
Latin
Luminous.
Boy/Male
Muslim
Luminous
Girl/Female
Latin
Luminous.
Boy/Male
Hindu
Luminous
Boy/Male
Tamil
Luminous
Girl/Female
Latin
Luminous.
Boy/Male
Arabic, Muslim, Sindhi
Luminous
Girl/Female
Indian
Efficiency, Care
LUMINOUS EFFICIENCY-FUNCTION
LUMINOUS EFFICIENCY-FUNCTION
Girl/Female
Hindu
Surname or Lastname
English
English : variant of Richardson.
Boy/Male
Indian, Sanskrit
Giver of Great Riches
Girl/Female
Indian
Charitable and kind
Male
Danish
, lover, and, lord.
Male
Hebrew
(×—Ö·×™Ö¼Ö´×™×) Hebrew name derived from the word chayyim, CHAYYIM means "life."
Boy/Male
Indian, Sanskrit
Melody of Voice
Female
French
French form of Greek Elisabet, ÉLISABETH means "God is my oath."
Girl/Female
Australian, Irish
Saint
Girl/Female
American, British, English, French
Rejoicing; Delight; Great Pleasure; Jubilation; Happiness
LUMINOUS EFFICIENCY-FUNCTION
LUMINOUS EFFICIENCY-FUNCTION
LUMINOUS EFFICIENCY-FUNCTION
LUMINOUS EFFICIENCY-FUNCTION
LUMINOUS EFFICIENCY-FUNCTION
n.
Any luminous winged insect, esp. luminous beetles of the family Lampyridae.
n.
Conceit; self-confidence; self-sufficiency.
a.
Shining; emitting or reflecting light; brilliant; bright; as, the is a luminous body; a luminous color.
a.
Clear; evident; luminous.
n.
The quality of being efficient or producing an effect or effects; efficient power; effectual agency.
a.
Having written much, or produced many volumes; copious; diffuse; as, a voluminous writer.
n.
Causing effects; producing results; that makes the effect to be what it is; actively operative; not inactive, slack, or incapable; characterized by energetic and useful activity; as, an efficient officer, power.
a.
Characterized by ruin; ruined; dilapidated; as, an edifice, bridge, or wall in a ruinous state.
n.
The ratio of useful work to energy expended.
n.
Joint efficiency; cooperation.
a.
Causing, or tending to cause, ruin; destructive; baneful; pernicious; as, a ruinous project.
a.
Pertaining to or containing alum, or alumina; as, aluminous minerals, aluminous solution.
v. t.
Power of action; agency; efficiency.
n.
Alt. of Efficiency
a.
Enlightened; intelligent; also, clear; intelligible; as, a luminous mind.
a.
Illuminated; full of light; bright; as, many candles made the room luminous.
n.
The quality of being inefficient; want of power or energy sufficient; want of power or energy sufficient for the desired effect; inefficacy; incapacity; as, he was discharged from his position for inefficiency.
n.
An efficient cause; a prime mover.
a.
Bright; shining; luminous.
a.
Luminous.