What is it
LiteBlue LED produces white light using GaN (Gallium Nitride) based die of 465 - 470 nanometers wavelength and then excited through a phosphor coating of special formula. The emitted light spectrum peaks at 465 nm wavelength, and it consists about 90% blue-turquoise light within the blue light content. It is designed to provide maximum circadian entrainment for people staying long hours in an indoor environment, like office and school.
Blue light wavelength of 460 - 480 nm being most sensitive to suppress Melatonin

Recent studies show that blue light is the most potent wavelength to regulate circadian rhythm after long hours light exposure [1], whereas 460 - 480 nm is the most sensitive wavelength range to suppress Melatonin [2]. Its peak quantum sensitivity is at 464 nm [3].

LiteBlue LED emits high percentage of blue light content (415 - 490 nm) with peak blue wavelngth at 465 nm, which maximizes the spectral power in the most sensitive range of 460 - 480 nm. Through advanced LED technologies, its spectrum has exceptionally high ratio of roughly 0.9 : 0.1 for blue-turquoise light (456 - 490 nm) and blue-violet light (415 - 455 nm) respectively. For details, please click here.

Lower risk of Retinal Blue Light Hazard - IEC/EN 62471

LiteBlue LED emits about 10% of blue-violet light within the blue light content, thus substantially lowering the LB (Retinal Blue Light Radiance) value that can lead to reduction of the risk of Retinal Blue Light Hazard. Compared with the standard LED of 450 nm blue pump, LiteBlue LED can lower the LB value by about 20%. For details, please click here.

Laboratory experiment also shows that blue-turquoise light causes lower cell death rate by about 2 times than the blue-violet light [4]. Below graph shows that the cell apoptosis (death) in relation to different wavelength. For details, please click here.


1 Gooley J.J. et al. Spectral responses of the human circadian system depend on the irradiance and duration of exposure to light.

2 Rahman S.A. et al. Spectral modulation attenuates molecular, endocrine, and neurobehavioral disruption induced by nocturnal light exposure.

3 Brainard G.C. et al. Action Spectrum for Melatonin Regulation in Humans: Evidence for a Novel Circadian Photoreceptor.

4 Arnault, E. et al. Phototoxic action spectrum on a retinal pigment epithelium model of age-related macular degeneration exposed to sunlight normalized conditions.
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