With the discovery that human beings respond to light at a biological level, research began to unearth the effect of lighting on mood, productivity, perception and visual acuity, as well as circadian rhythms. Because of LEDs real-time colour and light-level changing capabilities, they have given rise to new products and systems focused on the biological effects that lighting can produce.
Office: The most important application can be found at the office. HCL can be fully realized through LEDs. Because LEDs allow easy variation of intensity and spectrum, workers can enhance their concentration as well as adjust the lighting to their individual taste. Eventually, this can benefit the employer by improving productivity along with reducing sick days.
Airline: The airline industry is also using HCL to provide a better experience to customers. Airplane crew, for example, can adjust LEDs to correspond to the various phases of overnight flights: bright light for boarding, warmer whites for mealtime as well as a deep purple hue resembling the night sky for sleeping. Moreover, when it is time to wake up, the cabin lighting changes to mimic a sunrise, facilitating passengers make the transition to their destination’s time zone.
Schools: Another useful application can be seen in schools. For kindergarten kids, lighting can be adjusted to a warmer white in the afternoon to help them adapt for nap time and to a cooler white when it is time to be alert and pay attention. Many teenagers struggle to wake up in the morning, so high school classroom lighting can be set to levels mimicking daylight to facilitate teens feel more alert as the school day gets underway.