Dr Belal Aboushi is a senior associate lighting research engineer at the Pacific Northwest National Laboratory.

In this conversation, Belal shares some of his research into the role of light in creating a happy, healthy and productive workplace.

He explains how four key dimensions of lighting combine to improve sleep duration and quality - intensity, spectral distribution, orientation and dynamic changes over time. He also describes research that explores the potential of artificial lighting to replicate some of these qualities - with promising results.

If you want to reach out to Belal, see his contact information here.