Aurora Lighting Trade 2020 Brochure

Lighting Terms

Colour Rendering Index (CRI) A measure of the ability of a light source to reproduce the colours of various objects. A minimum CRI of 80 is recommended for most general domestic and commercial applications, but CRI90+ can be bene fi cial for some environments, e.g. retail. Lumen Depreciation (L70) Lumen depreciation values re fl ect the overall performance of a light source through its life. Although still operational, all fi xtures will experience a level of lumen loss/depreciation. A fi xture’s L70 value states after how many hours in operation will the fi xture still be producing 70% of its original lumen output. For example, a fi xture that produces 1,000 lumens with a L70 50,000 hours means that after 50,000 hours operation, the lumen output will have dropped to around 700. IK ratings are de fi ned as IKXX, where “XX” is a number from 00 to 10 indicating the degrees of protection provided by a luminaire against external impacts. The IK rating scale identi fi es the ability of an enclosure to resist impact energy levels measured in joules (J) IK Rating

Degrees of Protection against external mechanical parts IK00 IK02 IK03 IK05 IK06

IK07

IK08

IK09

IK10

IK00

Non-protected

0.2J

0.35J

0.5J

0.7J

1J

2J

5J

10J

20J

Colour Temperatures

Colour Temperatures in words

Colour Temperatures in numbers

Effects on colour

Typical applications

6500K

Strongly enhances blues and greens. White has a blue appearance.

Information

Of fi ces, Hospitals and Industrial

Daylight White

5000K +

5000K

Enhances blues and greens. White has a blue appearance.

Of fi ces, Hospitals and Industrial

4000K

Cool White

4000K - 5000K

3500K

Enhances red, orange and green. White has a yellowed appearance.

Residential, Restaurants and Hospitality

3000K

Warm White

2700K - 3500K

2700K

Strongly enhances red and orange. White has a warm orange appearance.

Residential, Restaurants and Hospitality

2200K

Extra Warm White

2200K - 2700K

EWW = 2200K

WW = 3000K

CW = 4000K

CD = 6500K

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