Malmbergs Lighting Brochure 2020

Technical Information

Light in Digits

Glossary

From Watt to Lumen

Colour Consistency – (SDCM) The colour consistency or chromaticity of the LED light is measured with the MacAdam system according to CIE standard. Deviation in colour consistency is defined with MacAdam ellipses in SDCM (Standard Deviation of Colour Matching). The scale is from 0-10 and 0 being the best chromaticity. 1-3 SDCM: For environments with high demands on colour consist- ency, e.g. lighting of white walls.

Incandescent (W)

Energy saving, halogen and LED lamps

Watt

Lumen

3-6 SDCM: Suitable for most indoor applications. 7-10 SDCM: Mainly for outdoor applications. Colour Rendering Index – Rendering Average (Ra)

15 25 40 60 75

120-135 220-250 410-470 700-805 920-1055 1330-1520 2140-2450 3010-3450

Colour Rendering Index (CRI) is given in Ra and runs from 1 to 100 and is the measurement for how well colours are rendered in the

light from a certain light source. Colour Temperature – Kelvin (K)

100 150 200

The standard unit for colour temperature is Kelvin (K). The most common colours are warm white and white. A higher colour temper- ature is often perceived to create a better colour rendering and visual acuity. The higher the colour temperature, the colder the light. Constant Light Output (CLO) Means that the luminaire gives the same amount of luminous flux throughout its specified burn time. Illuminance/ – Lux (lx) Illuminance describes the quantity of luminous flux falling on a sur- face. Standard unit for illuminance is Lux (lx) which is lumens per square metre (lm/m²). The illuminance decreases by the square of the distance (inverse square law). Luminous Flux – Lumen (lm) Lumen (lm) measures the luminous flux of the lamp, i.e., the total amount of visible light emitted by a light source. Example: 100W incandescent lamp = 1400 lumen = 14 lumen/watt The average luminous flux in different light sources: Incandescent: 14 lm/W Halogen lamp: 24 lm/W Energy saving lamp: 66 lm/W LED lamp: 100 lm/W Luminous Intensity – Candela (cd) The luminous intensity describes the quantity of light that is radiated in a particular direction. Luminous intensity is represented by the luminous intensity distribution curve (LDC). The unit is called candela (cd). One cd is the amount of light emitted by a candle in a given direction. Power Output – Watt (W) The more watts, the more energy the lamp is using when lit. In a regular light bulb, only 10% of the energy is converted into light whereas the remainder turns into heat. In efficient halogen lamps, low energy lamps and LED lights, more of the energy is converted into light. This means that you can replace a 60W light bulb with a low energy lamp of 11-13W and still get the same luminous flux. Unified Glare Rating (UGR) The UGR rating helps to estimate how likely a luminaire is to cause discomfort glare. The glare is measured in the UGR unit. See latest European standard EN 12461. Regulations concerning light fixtures All light fittings must undergo type testing. During type testing the luminaires are tested regarding safety according to European standards EN 60598-1 with applicable supplementary standards. The luminaires are also tested according to EMC emission and immunity, EN 61547 and EN 55015. Luminaires with electromagnetic parts are coved by the EMC Directive 2014/30/EU and must therefore be CE marked. The CE certificate also means that the luminaire must meet the requirements of the Low Voltage Directive LVD 2014/35/EU.

Approximate values​. Not applicable to reflector lamps. The span is due to the fact that different types of lamps give slightly varying values. However, these variations cannot be seen by the naked eye. Source: Swedish Energy Agency 2011.

Colour Temperature (Kelvin)

l

l

l

l

l

l

2000K 3000K

4000K

5000K

6000K

7000K

2700K Incandescent

5600K Daylight

Caps

E27/E40

E14

B22

B15

G4/GY6,35

G9

GU5,3

GU10

R7s/RX7s

G5

G13

2G11

GX24q

G23 G24d/G24q

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