10 ENGLISH BOOKS RELATING TO «LUMINOUS EFFICACY»
Discover the use of
luminous efficacy in the following bibliographical selection. Books relating to
luminous efficacy and brief extracts from same to provide context of its use in English literature.
1
Light and Light Sources: High-Intensity Discharge Lamps
Luminous efficacy 200 (lmW21) 160 o Major breakthrough 120 High-pressure
sodium 40 80 Metal halides Low-pressure sodium High-pressure mercury Low-
pressure mercury Incandescent Year Fig. 1.7. lamp [70] Evolution of luminous ...
2
Glass & Interactive Building Envelopes
Luminous efficacy [lm/W] presented in these figures is derived from the ratio: K:
Luminous efficacy = (measured inside illu- mination)[lx]/(measured external solar
radiation) [W/m2]. The given external solar radiation is composed of the direct ...
3
Solar Energy: The State of the Art : ISES Position Papers
This principally occurs outside visible wavelengths, so the remaining direct
radiation has a higher luminous efficacy. Direct luminous efficacy therefore: •
decreases with increasing atmospheric aerosol content and hence with
atmospheric ...
4
Solar Radiation and Daylight Models
A simple, yet robust model is the use of a single, averaged value of luminous
efficacy, a technique that has been adopted by several authors (Littlefair, 1985).
An average value of between 93 and 115 1m/W is quoted for beam luminous ...
5
Sustainable Building - Design Manual: sustainable building ...
For example, a 100 W incandescent lamp that supplies 1700 lm has an efficacy
of 1700 lm / 100 W= 17 lm/W. It is necessary to consider ballast losses in an
efficacy value, which can add 20% or more to the total losses. The luminous
efficacy of ...
6
Computer Vision and Applications: A Guide for Students and ...
2.4.3 Luminous efficacy Luminous efficacy is used to determine the effectiveness
of radiative or electrical power in producing visible light. The term “efficacy” must
not be confused with “efficiency.” Efficiency is a dimensionless constant ...
Bernd Jähne, Horst Haussecker, 2000
7
Practical Handbook on Image Processing for Scientific and ...
It is important to realize that the luminance — just as the radiance — is defined
per projected area (Section 3.3.4d). 3.3.5c Radiation Luminous Efficacy.
Radiation luminous efficacy, Kr, is defined as the ratio of luminous flux (light in
lumens) to ...
8
Daylight Science and Daylighting Technology
Km R 780 380 Fe;lVðlÞdðlÞ R 780 Effv 1⁄4 380 Fe;l dðlÞ ðlm/WÞ; (3.37) where
Fe;l is the spectral distribution of the radiant flux at wavelength l, K m 1⁄4 683lm/W
is the maximal luminous efficacy for the normalized wavelength lm 1⁄4 555 nm, ...
Richard Kittler, Miroslav Kocifaj, Stanislav Darula, 2011
Naftaly Menn. wavelength and the full range of wavelengths where the sensitivity
of the eye differs from zero is from 380 nm to 770 nm. Monochromatic light flux of
1 W power at λ = 0.555 μm is equivalent to 683 lm. Luminous efficacy, K(λ), ...
10
Handbook of Nitride Semiconductors and Devices, GaN-based ...
1.7.1 Luminous Efficacy The luminous efficiency of light sources involves the
efficiency of energy conversion from electrical power (W) to optical power (radiant
flux in watts), followed by conversion by the eye sensitivity over the spectral ...
10 NEWS ITEMS WHICH INCLUDE THE TERM «LUMINOUS EFFICACY»
Find out what the national and international press are talking about and how the term
luminous efficacy is used in the context of the following news items.
Nordeon Introduces Vulkan: Multifunctional LED Outdoor Luminaire …
Lumen packages range from 1,200 lm at 12 W to 14,000 lm at 140 W with luminous efficacy approaching 119 delivered lm/W on some models. «ThomasNet News, Jul 15»
Syhdee improves LED tube performance with plastic body and …
Besides innovation in tube light mechanical design, this new plastic LED tube has several strengths: luminous efficacy and beam angle. «LEDs Magazine, Jul 15»
Global Traditional Incandescent Bulbs Industry
... Bulbs Banned inAll Western Countries II-1Rapidly Emerging Energy-Saving Lighting Technologies II-3Table 1: Luminous Efficacy (lm/Watt) ... «MarketWatch, Jul 15»
3 trends driving optoelectronics market growth through 2019
High-brightness LEDs (HB-LEDs) have reached the luminous efficacy of fluorescent lights and are in a position to be a major factor in the $100 ... «ECNmag.com, Jul 15»
Wattage Vs Lumens: How to determine the efficiency and brightness …
'Lumens per Watt' refers to luminous efficacy, which enables an objective comparison of different lamps. The higher the Lumens per Watt, the ... «Architecture and Design, Jun 15»
The Grow-Light Blues
And then luminous efficacy would be stretched. Light-form carbohydrate spectrum, rays of protein. Yup. Radical color temps and other PAR ... «The New Yorker, Jun 15»
Samsung launches chip-on-board LED packages with small LES …
The new lineup features high luminous efficacy of 110lm/W at a correlated color temperature (CCT) of 3000K, CRI of 80+ and junction ... «Semiconductor Today, Jun 15»
Three trends driving optoelectronics market growth through 2019
High-brightness LEDs (HB-LEDs) have reached the luminous efficacy of fluorescent lights and are in a position to be a major factor in the $100 billion global ... «ElectroIQ, Jun 15»
Three trends driving optoelectronics market growth
High-brightness LEDs (HB-LEDs) have reached the luminous efficacy of fluorescent lights and are in a position to be a major factor in the $100 ... «evertiq.com, Jun 15»
Stakeholders make progress on LED lighting horticulture standards …
Instead of luminous efficacy used for general illumination, a new measure or definition of efficacy will be developed. In addition to the ... «LEDs Magazine, Jun 15»
