| Circadian system The circadian system is our internal body clock; a 24-hour cycle (or thereabouts) that tells us when to... |
| However, our circadian rhythm can be easily disrupted, and light is one of the primary factors that will do so. Too much... |
| Circadian lighting To optimise our circadian system, and ultimately our health and wellbeing, electric light needs to imitate... |
| Correlated colour temperature Correlated colour temperature (CCT) refers to the colour of the light source (bulb) and is... |
| Warm white light At the lower end of the Kelvin scale, warm white light ranges from 2700K to 3500K. This produces a warm,... |
| Warm white light is cosy, calm, inviting and intimate. It is a good choice for spaces you occupy in the evening, such as... |
| Natural white light and cool white light Natural and cool white light range from 3500K to 5000K, making them most akin to... |
| Natural white light is less harsh than cool white light and can be used in functional spaces such as the bathroom or pantry,... |
| Cool white light veers towards the higher end of the spectrum and is similarly suitable for task lighting, and in home offices... |
| Daylight white light At 5000+ Kelvins, daylight white light is most equivalent to noon sunlight. It is crisp and invigorating... |
| Blue light The higher the Kelvins, the more blue light that daylight white light emits. Cells in our eyes sense blue light... |
