What is the correct light level for the task

In this video I introduce the concept of task-based lighting criteria. Task based lighting design provides light where we need it, when we need it. It also allows for reduced illumination levels in the surrounding spaces, for example circulation. This efficient design approach results in reduced energy consumption: https://youtu.be/6qrxPoqOndo

Based on our 30+ years of experience, we define appropriate light levels for the task or space. We have just updated this, adding more categories and it’s yours free to download: https://djcoalition.com/wp-content/uploads/uploads/220926_djc_room-illumination-levels.pdf

Here are some useful design guides we use when thinking about light levels:

– Dark finishes absorb light thus reducing light reflectance. Use this for adding dramatic effect by highlighting accents.
– For our eye to easily perceive contrast the light level has to change by a factor of 3.
– Uniformly light the task area to provide least tiring conditions for the eye.
– We perceive cold light as being brighter than warm light of the same intensity.
– Remember, light for task, don’t over light. The more light you provide the more power you burn.

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