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LARK & ACCESSORIES
Glossary
TECHNICAL INFO
NOTE CONCERNING THE VALUES SPECIFIED IN THIS CATALOGUE
The power (W) and luminous flux (lm) values specified in this
catalogue correspond to the lighting source. Should you wish
to know the power values of the system (including the driver’s
consumption), these are specified in the Technical Data Sheet
of each item, available at www.arkoslight.com
QUALITY CRITERIA FOR LED SELECTION
Arkoslight methodically selects its LED lighting sources,
using the “binning” classification method. During the
production process of the LED, and taking into account
the manufacturing tolerances, certain variations of the flux,
the colour temperature or the voltage usually occur.
For this reason, the production of the LED is classified in
“BIN”, according to the formerly mentioned parameters.
When choosing the lighting sources for its luminaires,
Arkoslight always selects the “BIN” or the groups
corresponding to all the LED to be used for the luminaires
to be produced. In doing so, a significant reduction of the
tolerance range of these 3 characteristics can be obtained
and likewise ensures greater stability of the luminous flux,
voltage and colour temperature.
LUMINOUS FLUX (lumen):
This is the measurement of the total luminous output emitted
by a light source throughout the surrounding space.
ILLUMINANCE (lux)
This is the unit that measures the degree of luminous flux
received on a surface. The lux can also be defined as the
number of lumens/m2
LUMINOUS EFFICENCY (lm/W)
Specifies the efficiency of a light source converting electrical
energy into light.
LUMINAIRE EFFICIENCY - LOR (%)
This is the ratio of light output emitted by the luminaire to the
light output emitted by its lamps.
UGR
This is a scale which unifies different glare evaluation methods.
The UGR describes subjective perception in measurable
terms considering the potential glare of all the luminaries
located within the observer’s field of vision. The values range
between 10 and 30, where 10 means “no glare” and 30 means
“discomfort glare”. The UGR value is not a characteristic of the
luminaire itself, but of the entire installation, which is why the
calculated UGR values specified in our catalogue are based on
a common standard installation. The UGR calculation for your
particular installation is recommended to ensure the desired
UGR value. All UGRs specified in this catalogue are calculated
under the values: 4H 2H Shr1
IK
The IK protection level is an international numerical
classification for the degrees of protection provided by casings
of electrical materials against external mechanical impacts, as
specified in Table 1.
IP CODE
Coding system which specifies the degrees of protection
provided by an enclosure against access to hazardous parts,
penetration of solid foreign bodies and water ingress.
The IP code consists of two digits immediately following the
letters “IP”, the meaning of which is specified in Table 2.
DIMMING
DALI (Digital Addressable Lighting Interface)
It is a dimming standard for lighting which enables equipment
from different manufacturers to be integrated into a single
network. A DALI network consists of a controller and one or
more devices for the lighting installation (drivers, sensors,
switches, push buttons...) which have DALI interfaces.
PUSH DIM
Dimming control via a push button switch.
No standard exists for push button dimming, reason why
various wiring and installation options exist for this type
of dimming depending on each equipment manufacturer.
Generally, one or two extra wires will be required for
installation, depending on each manufacturer.
PHASE CUT
Phase cutting is carried out without the need for an additional
control light, by connecting a dimmer in line between the
power supply line and the equipment. Depending on how
the mains voltage is cut, a distinction can be made between
Leading-edge and Trailing-edge.
DIM ON BOARD
The luminaire has an integrated dimmer for direct and
individual control.
1-10V
Continuous dimming via analogue control signal. Light levels
can be set anywhere between 10% to 100% of light output.
ELECTRICAL SAFETY
Class I Luminaires
Luminaires in which the protection against electric
shocks does not depend solely on the main insulation,
but on an additional safety device such as a connecting
system between the accessible conductive parts and the
protective earth conductor.
Class II Luminaires
Luminaires in which the protection against electric
shocks does not depend solely on the main insulation,
but comprises additional safety devices, such as double
insulation, or reinforced insulation, and on which there is
no protective earth system nor any dependence on the
conditions of the installation.
Class III Luminaires
Luminaires on which the protection against electric
shocks depends on the supply of very low safety voltage
and on which the voltage generated is not higher than
that supplied.
IK Code
IK00
IK01
IK02
IK03
IK04
IK05
IK06
IK07
IK08
IK09
IK10
Impact energy (joules)
*
0.15
0.20
0.35
0.50
0.70
1
2
5
10
20
FIRST FIGURE
SECOND FIGURE
IP
Protection against direct
electrical contacts
Protection against penetration of solid
foreign bodies
Protection against the penetration
of moisture
0
No protection
No protection
No protection
1
Hand protection
Bodies of ø > 50 mm
Vertical dripping wate
2
Finger protection ø > 12 mm
and 80 mm long
Bodies of ø > 12.5 mm
Dripping water tilted up to 15°
3
Tool protection
Bodies of > 2.5 mm
Dripping water tilted up to 60°
4
Metal wire protection
Bodies of > 1 mm
Splashing water in all directions
5
Metal wire protection
Dust can enter in a harmless quantity
Water jets in all directions
6
Metal wire protection
No entry of dust
Strong water jets in all directions
7
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Temporary immersion
8
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Constant immersion (submersible material)
under manufacturer’s conditions
TABLE 1
TABLE 2
III
