Circadian Lighting

Samsung bets on move to ‘human-centric’ lighting

An office with empty desks and blue and yellow lighting
Melatonin responds to the blue wavelength range of light. Brighter blue-concentrated lighting suppresses the body’s production of melatonin, increasing concentration and enabling a greater overall sense of alertness.

ONE OF THE world’s biggest technology brands has unveiled so-called ‘human-centric’ lighting technology in the belief that the market is moving towards tuneable lighting.

Korean giant Samsung announced its first human-centric LED packages, which are designed to be built into lights by luminaire manufacturers.

Unusually, Samsung is claiming the its range of modules – known collectively as LM302N – helps people to adjust their levels of the sleep-wake hormone melatonin. 

Melatonin responds to the blue wavelength range of light. Brighter blue-concentrated lighting suppresses the body’s production of melatonin, increasing concentration and enabling a greater overall sense of alertness. 

Similarly, a lower blue light intensity minimises disturbances to the natural onset of the body’s melatonin production, helping to promote sleep.   

This tuneability, says the company, can help make people feel more energetic or relaxed depending on their daily life patterns. 

Samsung’s LM302N uses precisely designed light spectrums with optimised amounts of the precise blue which is known to influence human biology.

Two 3x3mm modules are initially available:  the LM302N DAY improves alertness while the LM302N NITE is designed to enhance relaxation.

The LM302N DAY can suppress the body’s melatonin level more than 18 per cent below that of conventional LED lighting, says Samsung. 

Available in a variety of colour temperatures from 3000K to 6500K, the DAY package can be used in a diverse range of indoor applications, such as schools, offices, libraries and industrial sites, to enhance an individual’s sense of alertness and energy levels. 

Two 3x3mm modules are initially available:  the LM302N DAY improves alertness while the LM302N NITE is designed to enhance relaxation.

The LM302N NITE can provide a proper level of brightness without hindering the release of melatonin, helping people to maintain the hormone level as if they were in a calm natural atmosphere at night. 

Samsung says the body releases about five per cent more melatonin under lights with the LM302N NITE packages than conventional LED packages, increasing relaxation. 

By comparison, spending a lot of time under conventional nighttime lighting can cause excessive alertness that makes it harder to fall asleep. 

Additionally, the LM302N NITE is offered in colour temperatures between 1800K and 4000K, providing design flexibility to bring the benefits of relaxing light to a variety of lighting spaces.

The DAY and NITE packages can also be combined into a single luminaire to help people maintain their natural circadian rhythm 24 hours a day. 

This duo-lighting option is optimal for those who spend most of their time indoors and struggle with confused body clocks. 

‘The benefits of the LM302N reach beyond the basic lighting function of visual recognition by improving the non-visual biological effects of lighting on people,’ says Un Soo Kim, senior vice president of LED Business Team at Samsung Electronics.