500 5. The luminous flux values for light sources are given in
the product lists lamp manufacturers.
Luminous efficacy
Luminous efficacy measure the efficiency light
source. For example, incandescent bulb
with its warm white light may have colour temperature
of 2,700 bright white fluorescent lamp 4,000 and a
fluorescent lamp producing near daylight conditions
around 5,000 K.
Glasses
Hand blown glasses
Hand blown glasses are individually made skilled
craftsmen and each glass unique.
Incandescent
lamp
Halogen lamp
Energy saving
lamp
LED
0 10,000h 20,000h 30,000h
Lifespan
up to
Incandescent
lamp
Halogen lamp
Energy saving
lamp
Fluorescent lamp
LED
8,000h
20,000h
30,000h
3,000h
1,000h
.General information
Allgemeine Informationen
General Information 299
Light output (Im W)
Lifespan
Light colour Kelvin
Explanation technical terms
Lumen
Luminous flux (lumen; Im) describes the useful power
emitted light source all directions adjusted for the
international standard established for human eye sensiti-
vity. The illuminance values
required for artificial lighting are established German In-
dustrial Standards. Air bubbles within the
glass are sign manual craftsmanship and are reason
for rejection.500 K
10
25
60
100
0 100
Light output (Im/W)
approx.000 6.
Lux
The value for illuminance (lux; lx) denotes how much light
falls unit area surface.
WOFI LED Lights
Incandescent lamp
Classic LED Daylight
3. tells how many lumens per Watt are produced
by lamp: the higher the lumen/Watt ratio (Im/W), the more
efficient the light source.
Light colour
The light colour lamp can defined terms of
’colour temperature` which measured using the Kelvin (K)
temperature scale
