Search

LESSON TWO: Colour temperature and CRI

Colour temperature is an indicator of eye comfort – and CRI is one of the many differences between cheap and quality LED lights.

So what is colour temperature?

Light colour temperature is represented in the unit of absolute temperature, Kelvin.

To put these numbers into perspective, around our homes we typically choose lights with colour temperatures of 2700K (warm incandescent), 3000K (warm white halogen) and 3500K (household fluorescent).

Colour temperatures higher than 3500K are typically used for commercial and hospital applications, and 4000k for task/ commercial applications.

When applying what we know to the driving environment, contrast is key. Night drivers want clarity not glare – trees, roads and obstacles need contrast to be seen. If the colour temperature is too high, objects in the distance will appear white and glaring, causing eye fatigue and squinting… but if you need a powerful light, the eye discomfort can be mitigated with a good CRI score, without losing out on brightness…

What is CRI?

‘CRI’ stands for “Colouring Rendering Index”, and it’s pretty important when it comes to lighting. CRI measures how easily the human eye can distinguish between different colours – and when you have a powerful light, you need to have a good CRI score to reduce glare and comfortably perceive any hazards on the road.

Lightforce lights are all built with a minimum of 80 CRI. To put this into context, natural daylight has a score of 100 CRI, and cheap LED lights usually sit around 60 CRI – very uncomfortable and tiring for the eyes.

Next week we’ll be talking about one of the most hotly-debated driving light topics – lumens, lux, and the relevance of distance!

Read Driving Light Technology Lesson One

 

Sign up for eNews


AUSTRALIAN AND INTERNATIONAL ENQUIRIES (EXCEPT USA)

Lightforce Australia PTY. LTD.

11 Manton Street, Hindmarsh
South Australia 5007
AUSTRALIA

1 800 03 03 08
TEL: 08 8440 0888
FAX: 08 8346 0504
INTL: +61 8 8440 0888

LIGHTFORCE USA

Please note that the North American Lightforce website is currently under construction. If you require product information or pricing for this region, please contact our North American Customer Service Team on 0011 1 877 510 9204 or via email: lfusa@lightforce.com



Click here to view our Driving Light Catalogue, or Click here to view our Sporting Catalogue.

With more than 35 years’ experience in the field of precision manufacturing, Lightforce has forged an international reputation as the world’s leading manufacturer of innovative 12 volt professional lighting equipment and tactical riflescope optics.

Lightforce now exports to more than 50 countries, supplying products that are designed and manufactured to deliver performance in the most hostile conditions. From the frozen Arctic tundra to the scorching heat of the Australian Outback, Lightforce products are built to go the distance.

Please note that the North American Lightforce website is currently under construction. If you require product information or pricing for this region, please contact our North American Customer Service Team on 0011 1 877 510 9204 or via email: lfusa@lightforce.com. Otherwise, call us on 1800 03 03 08.