OLED LiFi Lighting products are unique because they are manufactured with an understanding of how the human eye perceives light.
A short explanation might be in order:
The eye sensitivity curve V(λ) is based on measurements at photopic light level with a 2° view angle (faveal). (CIE standard 1931.)
Diagram 1 shows that our eyes can see light from blue to deep red with highest sensitivity in the green/yellow area. 1 Watt converted into light with 100% efficiency results in 683 lumens.
Diagram 2 shows that during the day (at Photopic light levels) our vision is the best at 555 nanometers. At night, (at Scotopic light levels) our visibility is best at 505 nanometers.
Diagram 3 shows that the best day vision is at 555nm (Yellow – Green) and at night vision is at 505nm (Green – blue). With LED, light composition can be chosen with more accuracy compared to with conventional light sources, for instance: green at 509 nm (with 2 nm deviation). Light with a green component gives best sight in street lighting at minimum illumination levels: our visual perception mainly relies on our sensitive rods.
Studies have shown that the ratio between Scotopic (night) and Photopic (day) vision (S/P ratio), is a base which can be used to multiply the lumen with the S/P ratio to express the real light perception and it also indicates how comfortable the atmosphere and the perceived brightness is.
