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“What has been lacking in conventional indoor lighting is 480nm light, which is abundant in the morning sun,” according to the company. “This 480nm light stimulates the secretion of serotonin and activates the human body and mind. The more serotonin secreted in the morning, the more melatonin, a sleep hormone, is secreted 14 to 16 hours later, using it as a source.”
Its azure LED is the 3 x 3 x 0.8mm NF2E757H-F1, which produces 29.5 lm at its nominal 65mA 2.74V (~180mW).
Abs max figures are 180mA, 240mA pulsed, 85mA in reverse, and 540mW. Thermal resistance is typically 11°C/W (17°C/W max) junction to temperature measurement point (with PCB caveats).
The spectrum is dominated by a blue peak just below 450nm, with phosphors spreading output down into amber.
Part of the company’s 757 Series, Nichia is proposing that many of them be used alongside warm-white LEDS from the same series (left) in a hue-changing concept it has trade-marked ‘Dynasolis’.
“A feature of Dynasolis is to support the optimisation of circadian rhythms by adjusting both the amount of azure-coloured light, which vitalises humans, and color temperature,” it claimed. “From the late afternoon, the light is gradually changed to a lower CCT, which is calmer and more relaxing, allowing people to relax, feel more comfortable, and sleep more smoothly.”
Nichia will be exhibiting at Light + Building in Frankfurt.
