
	Where results make sense

Topic: Luminous flux

Related Topics

Luminous efficiency

Luminous efficacy

Lumen (unit)

Luminous intensity

Photometry (optics)

Candela

Candlepower

Luminance

Lux

Intensity

Luminosity

Lumen

Light

SI unit

Steradian

	Luminous Flux
		The luminous flux is the part of the power which is perceived as light by the human eye, and the figure 683 lumens/watt is based upon the sensitivity of the eye at 555 nm, the peak efficiency of the photopic (daylight) vision curve.
		For instance, the Luminous Flux for a 100W incandescent lamp is approximately 1700 lm.
		This is the Luminous Flux for that lamp.
	hyperphysics.phy-astr.gsu.edu /hbase/vision/lumpow.html (781 words)

	Lighting definitions
		Luminous flux is the quantity of the energy of the light emitted per second in all directions.
		Luminous intensity is the ability to emit light into a given direction, or it is the luminous flux that is radiated by the light source in a given direction within the unit of the spatial angel.
		Luminance L is the luminous intensity emitted by the surface area of 1 cm² (or 1 m²) of the light source.
	home.tir.com /~ms/lightingdefinitions/lightingdefinitions.html (365 words)

	[No title]
		The peak response of the eye shifts from 555 nm to 510 nm as scene luminance is decreased from the photopic region to the scotopic region.
		Luminous flux, F, is akin to the time rate of flow of photons except that the photons are not given a value based on their wavelength or energy but rather on how bright they apppear to the eye.
		Luminous intensity, I, is the solid-angular density of luminous flux.
	www.ibiblio.org /pub/multimedia/3d/3d-photo/photometry (1400 words)

	Bright View Electronics Co., Ltd.
		Luminous efficacy of a source is the ratio of output luminous flux (lm) to input electrical power (W).
		Luminous efficacy of a radiation is the ratio of luminous flux (lm) to radiant power (W), and is therefore the theoretical maximum that a light source with a given spectral distribution can achieve with 100% radiant efficiency.
		Illuminance is the density of the luminous flux incident on a surface.
	www.bvled.com.tw /08_faq.htm (479 words)

	Luminous Flux Density \| Illuminance \| Illumination \| Lux \| Luminous Exitance \| Luminous Emittance
		Luminous flux density is photometrically weighted radiant flux density, which means luminous flux per unit area at a point on a surface where the surface can be real or imaginary.
		Luminous exitance or is the total amount of visible light leaving a point on a surface into all directions above the surface.
		Therefore luminous exitance is equivalent to radiant exitance weighted with the response curve of the human eye.
	www.schorsch.com /kbase/glossary/illuminance.html (228 words)

	Basic Illumination Concept
		Luminous flux is the rate at which light energy flows from the source.
		The luminance of a light source, L,in a given direction is defined as the luminous intensity per unit projected surface area of the light source in that direction, i.e.
		The luminance of an illuminated surface in a given direction is defined as the luminous intensity per unit area coming from the surface in the particular direction.
	personal.cityu.edu.hk /~bsapplec/basic.htm (200 words)

	Longlite - Stick it to your bulb
		Ratio of the absorbed radiant or luminous flux to the incident flux.
		Luminance that has to be added, by superposition, to the luminance of both the adapting background and the object in order to make the luminance difference threshold in the absence of disability glare the same as that experienced in the presence of disability glare.
		The ratio of the total flux of the luminaire, measured under specified practical conditions, to the sum of the individual luminous fluxes of the lamps operating outside the luminaire under specified conditions.
	www.longlite.com /Glossary/Glossary.aspx (5379 words)

	Candela
		Luminous emission is not the same as the perceived brightness of the source when you look at it.
		The luminous intensity of a "white" light source is defined by multiplying the watts emitted at each wavelength by the efficiency of that wavelength in exciting the eye, relative to the efficiency at 555 nm.
		The lumen flux from a practical light source is the sum of the energy in each wavelength band, multiplied by the luminous efficiency of that wavelength.
	www.electro-optical.com /whitepapers/candela.htm (1466 words)

	phillyhiphop.com \| one region. one community. one site.
		The definition of Luminous Flux is Luminous: flux is a quantitative expression of the brilliance of a source of visible light, which is electromagnetic energy within the wavelength range of approximately 390 nanometers (nm) to 770 nm.
		There is a source of visible light in the Philly streets representing the very meaning of what it is to be Luminous Flux in the context of Hip Hop culture embodied in a curious duo of female emcees who have taken the moniker as their own.
		Luminous are two accomplished sistas with more than enough passion in their lyrics and beats to carry the album from drawing board to the record store shelf.
	www.phillyhiphop.com /_reviews/luminousflux-theywalk.html (446 words)

	Measurement of Light
		Flux is measured in terms of its ability to stimulate the standard photopic human eye.
		Luminance: The luminance, at a point of a surface and in a given direction, is the luminous intensity of an element of the surface, divided by the area of the orthogonal projection of this element on a plane perpendicular to the given direction.
		Luminous Flux: The lumen (lm) is the luminous flux emitted within a solid angle of 1 steradian by a point source having a uniform intensity of 1 candela.
	www.pc.ibm.com /ww/healthycomputing/vdt19a.html (358 words)

	Lumitex Specification 1 (Site not responding. Last check: 2007-10-12)
		It is equal to the flux on a unit surface all points of which are one unit distance from a uniform point source of one candela.
		Illuminance is the density of the luminous flux on a surface.
		Luminance (formerly photometric brightness) is the luminance intensity of any surface in a given direction per unit of projected area of the surface as viewed from that direction.
	www.lumitex.com /spec_1.html (277 words)

	[No title]
		] The unit of luminous flux, equal to the luminous flux emitted within a unit solid angle (1 steradian) from a point source having a uniform intensity of 1 candela, or to the luminous flux received on a unit surface, all points of which are at a unit distance from such a source.
		] The ratio of luminous flux in lumens emitted by a source at a particular wavelength to the corresponding radiant flux in watts at the same wavelength; thus this is a measure of the visual sensitivity of the eye.
		] The luminous flux incident on a small surface which lies in a specified direction from a light source and is normal to this direction, divided by the solid angle (in steradians) which the surface subtends at the source of light.
	www.accessscience.com /Dictionary/L/L24/DictL24.html (1592 words)

	Luminous Flux (F)
		Luminous Flux (F) Luminous Flux (F) The luminous flux describes the photometrically evaluated luminous efficiency, hence the light quantity delivered by a light source.
		The luminous flux is related to the entire room, or to only a part of it (partial luminous flux in a room-angle element).
		The ratio between luminous flux and the power consumed is known as Not all the luminous flux emitted by the lamp reaches the work plane.
	www.zumtobel.com /light-dictionary/en/Litec_enLuminous_Flux_F.html (145 words)

	SID Article - Brightness, Luminance, and Confusion
		However, only that portion of the flux that falls within the cone defined by the effective area of the lens and the distance d, from the lens to the point on the source succeeds in arriving at the detector.
		The luminous flux collected by the photometer lens (and directed to the photodetector) is proportional to the projected area.
		The same luminous flux is now spread over a larger area as the angle between the axis of the flashlight and the normal to the surface increases.
	www.crompton.com /wa3dsp/light/lumin.html (2525 words)

	Luminous Flux \| Lumen
		Hertz, it is defined as 683 lm/W of radiant flux.
		As with luminous intensity, the luminous flux of light with other wavelengths can be calculated using the CIE photometric curve.
		The luminous flux is a very basic unit of measurement for light.
	www.schorsch.com /kbase/glossary/luminous_flux.html (180 words)

	OSRAM SYLVANIA:Sylvania Automotive Lighting Catalog
		It is the ratio between luminous flux and the area to be illuminated.
		An illuminance of 1 lx occurs when a luminous flux of 1 lm is evenly distributed over an area of 1 square meter.
		The luminance L of a light source or an illuminated area is a measure of how much the eye is stimulated and therefore of how great an impression of brightness is created in the brain.
	www.sylvaniaautocatalog.com /new_sylvania/glossary.htm (1016 words)

	PHOTOMETRIC TERMS - A SUMMARY (Site not responding. Last check: 2007-10-12)
		The unit of luminous flux = lumen = 1/685 Watts @ 555 nm.
		For example, given a flux reading, determine the solid angle from the area and the distance from the source and then divide the solid angle into the flux reading to get the luminous intensity of the point source.
		Luminance (brightness) in a given direction = luminous intensity emitted per unit area per steradian of solid angle of the receiver = candles/cm²
	vsg.cape.com /~pbaum/flux.htm (262 words)

	Illumination
		The total luminous flux E emitted per unit area from a lambertian surface of luminance B is easily calcuated.
		If you assume that a surface reradiates all the luminous flux that falls on it, then its luminance in apostilbs, lamberts or foot-lamberts is the same as its illumination in lux, phot or ft-cd.
		If B is the luminance of the object, and B' the luminance of the image, then the luminous flux in the input is BΩdA, while the luminous flux in the output is B'Ω'dA'.
	www.du.edu /~jcalvert/optics/lumens.htm (2743 words)

	[No title]
		Luminous intensity is a property of the source, not the light collected some distance from the source.
		Luminance is a property of reflective and glowing surfaces.
		The luminous intensity in the direction of the observer must take the cosine rule into account (we don’t have to correct for distance yet, since luminous intensity is a property of the source, without regard to distance).
	www.psych.upenn.edu /backuslab/vss2002/PhysicalModel_v03.doc (895 words)

	Device for regulating luminous flux of battery powered headlamp - Patent 4949014
		A low cost, highly efficient, lightweight device for regulating the luminous flux output of an incandescent headlamp as its battery supply voltage changes.
		Devices for regulating the output flux of a lamp are well known.
		This causes the ratio of the on-time to off-time to increase.
	www.freepatentsonline.com /4949014.html (2112 words)

	NIST Calibration Services: Photometric Measurements
		Lamp standards of luminous intensity, luminous flux, and color temperature, as well as reference photometers and materials as described below, are issued or calibrated on a routine basis.
		The glass plates, masked with a circular aperture 25 mm in diameter, are calibrated for the luminance within a circular area of 1 cm in diameter in the center of the aperture.
		The relative expanded uncertainty of luminance calibration is 0.8 %.
	ts.nist.gov /MeasurementServices/Calibrations/photometric.cfm (1187 words)

	Lighting Terminology (Site not responding. Last check: 2007-10-12)
		The unit of luminous flux F is the lumen (lm).
		Thus the luminous flux emitted by an isotropic light source of intensity
		The illumination (or illuminance) E of a surface is the luminous flux per unit area that reaches the surface:
	www.led.net /pages/tech3.htm (215 words)

	AWOL Magazine: Artist Profile for Luminous Flux (Site not responding. Last check: 2007-10-12)
		Luminous Flux may be defined as a creative collaboration of feminine energy, willing to express intuitive perception lyrically and sonically.
		Considering the repetitive nature of the industry, The Flux is definitely bringing something to the open ear.
		Luminous Flux has an interview in AWOL Magazine as well as a blazin' joint called 'Sometimes' on the cd track # 5.
	awol.objector.org /artistprofiles/Luminousflux.html (360 words)

	Large Electroluminescent Lamps, Strip Lamps and Extrusion- LUMINOUSFILM.COM — USA
		Luminous intensity is surface brightness, sometimes measured in candelas.
		Note that a big surface can have a high luminance at the same time that it has a low luminous intensity and vice-versa.
		The light output of the incandescent is spread over a much smaller area, so it has a much higher luminous intensity.
	www.luminousfilm.com /lumens_lux_stuff.htm (690 words)

	jargon (Site not responding. Last check: 2007-10-12)
		plane to the luminous flux emitted by the luminaire’s lamps alone.
		the portion of the luminous flux from a
		Photometrically, it is the luminous flux emitted within a unit solid angle
	www.amerillum.com /amerillum/jargon.htm (844 words)

	Light Waves
		Of all the electromagnetic waves, light is the only portion of waves that can be detected by the human eye.
		A light bulb is a luminous body that emits light in almost every direction.
		Thus, the illuminance is just the luminous flux divided by the area of a sphere.
	library.thinkquest.org /10796/ch10/ch10.htm (526 words)

	AWOL Magazine: Interview with Luminous Flux (Site not responding. Last check: 2007-10-12)
		So I was looking up light in the encyclopaedia and when you think of time travel… they say if you can go the speed of light, then you can time travel.
		I saw Luminous Flux and the definition was "the rate at which light can be seen hitting the surface." So I said, "Damn, that's precise!" Plus the two separate words: Luminous; shining, bright; Flux ; motion, movement.
		AWOL: When it comes to hip hop, a lot of people focus on some of the negative aspects of hip hop, particularly the violence against women, the degradation or disrespecting of women and the idea that sisters in hip hop got to "strip" to "sell" so to speak.
	awol.objector.org /articles/lfinterview.html (1588 words)

	fUSION Anomaly. Flux
		0 for data storage: A flux reversal typically represents a binary 1, and no reversal represents a binary 0.
		intensely mobile flux of past, present, and future.
		Design in art, is a recognition of the relation between various things, various elements in the creative flux.
	fusionanomaly.net /flux.html (666 words)

	TOSHIBA COMMERCIALIZES HIGH LUMINOUS FLUX WHITE LIGHT LEDS FOR ALTERNATIVE LIGHTING SOLUTION
		The company is scheduled to ship samples of the new white LED beginning in July and start mass-production in October at an initial volume of 1 million pieces per month.
		"The introduction of high luminous flux white LED is a significant milestone in the effort to make LEDs a viable alternative for a variety of lighting applications," said Masanobu Sato, business development manager, optoelectronics for TAEC.
		The luminous flux of White LEDs is achieving a higher, and longer operating life and lower power consumption which are ideal characteristics for future lighting solution alternatives to incandescent and fluorescent lamps.
	www.toshiba.com /taec/news/press_releases/2005/opto_05_269.jsp (612 words)

Try your search on: Qwika (all wikis)