What lighting strategies does a healthy building consultant have at their disposal to positively impact a building interior? In terms of space planning and interior architecture, we start with ensuring enhanced access to daylight not just around the perimeter of a floor plate but right through to its core. This is then combined with consideration for glare reduction to minimize the risk of daylight bouncing off screens and other surfaces, a visual distraction and source of low level anxiety. Thirdly, the implementation of circadian lighting and smart lighting systems in tune with the daily 24hr cycle help fill an interior with suitable tones of light according to the time of day, season and location. Finally, healthy building and wellness real estate certification systems such as WELL, LEED and BREEAM provide guidance via global benchmarks for wellbeing designers to use.