The concept of Human Centric Lighting (HCL) directly addresses the many challenges of busy lifestyles led by people today.

The sun plays a critical role in all biological processes on earth; sunlight has a significant impact on how we feel and in an ideal world, one would have substantial exposure to the sun’s nurturing rays. However, a busy lifestyle can be challenging to our internal body clock also known as ‘circadian rhythm’; to achieve a good circadian rhythm, we need a good Human Centric Lighting (HCL) solution.

HCL systems feature controllable lighting that sits on a spectrum of correlated colour temperatures (CCTs). The systems are designed to evoke human biological responses and support health, wellbeing and performance. CCTs are measured in Kelvin (K) and range from 2700K (warm) to 6500K (cool) – a broad spectrum that gives the ability to evoke different responses on a biological level.

Bespoke lighting solutions developed by Gerard Lighting’s expert in-house engineering and design team include HCL systems. Gerard Lighting offers tunable troffers that can assist in achieving the desired outcomes for HCL systems. Products such as Pierlite GenLED, Pierlite DLED and Siteco Scriptus can now be used in projects being designed to achieve WELL standard certification.

Human centric lighting systems deliver a multitude of benefits including improved health and sleep; significantly boosted patient and staff comfort helping achieve optimum health outcomes; and ability to regulate the production of important hormones and ensure proper functioning of the circadian rhythm.

Productivity and enhanced performance

According to Lighting Society Europe, HCL significantly enhances performance and wellbeing, to the point of increasing productivity by 4.5%, reducing errors by 2% and slashing absentee rates.

Visual acuity

Lighting has a direct impact on visual acuity. Light sources with higher amounts of blue (cool) light stimulate the intrinsically photosensitive retinal ganglion cells (ipRGC) photoreceptors, which in turn cause the pupils to contract. This contraction results in better visual acuity and allows clearer vision for longer, as the eye accommodates the light, rather than being stressed by it.


Significantly improved visibility can reduce the risk of trips and falls, which can otherwise be a major cause of injury in Australian workplaces.


HCL solutions from Gerard Lighting find application in diverse environments from workplaces and schools to health and aged care facilities.

Workplaces and offices

Helps improve learning, and increase concentration and performance, while enhancing efficiency and accuracy and contributing to positive social behaviour. It can also assist with reducing fatigue and errors in day-to-day work.

Education and schools

Helps increase efficiency and performance in studies by promoting circadian rhythm; in some cases, it can assist in promoting better sleep. HCL for the classroom can consist of five controls: general light (classroom light), reading, concentration, energy boost and relaxation.

Healthcare and aged care centres

Assists with improving learning and concentration in aged care facilities; HCL can also help to improve human wellbeing and health by adapting to support circadian rhythm, potentially assisting with cognitive function amongst aged patients. For hospital staff working at night, HCL can reduce fatigue and help them serve their patients better.