12464 “Lighting indoor workplaces”).
It describes the one hand light source’s impression of
brightness, and the other, surface and therefore depends to
a large extent the degree reflection (colour and surface).
Luminous intensity
The luminous intensity describes the quantity light that
is radiated parti
cular direction. This useful measure-
ment for directive lighting elements such reflectors. is
represented the luminous inten
sity distribu
tion curve
(LDC). Relevant standards specify the required illuminance
(e.
Illuminance: E(lx) =
luminous flux (lm)
area (m2)
Luminance
Luminance the only basic lighting para
meter that is
perceived the eye.
Abbreviation: Phi Unit: Lumen
Abbreviation: Unit: Candela
Abbreviation: Unit: Lux
Abbreviation: Unit: cd/m2
Illuminance
Illuminance describes the quantity luminous flux falling on
a surface.g.
.
The luminous efficiency the ratio the luminous flux
to the electrical power consumed (lm/W). measure
of light source’s economic efficiency.11
The Lighting Handbook
Luminous flux
The luminous flux describes the quantity light emitted
by light source
