Solution to the Problems as Above with a New Design: low frequency flicker removed; high frequency flicker removed; Electrical magnetic radiation meet international standard.

No infrared; No ultraviolet; No strong red; No strong green; blue light is reduced to safe value; spectrum optimized to simulate sun light


The voltage waveform across LED lamp; horizontal axis is time, vertical axis is voltage.

Patented technology is used by upright lighting LLC to remove ripple flicker. There is no low frequency or high frequency ripple flicker. The LED lamp brightness is constant and vision is protected to maximum.


All colors spectrum stand for percentage of colors included in the spectrum of LED lamp.

Blue color peak is at 60% energy at 450nm and blue light at other wavelength is less than 50% energy of other color.

All other color magnitude is continuous similar to sun light distribution

Retinal pigment epithelium cells are particularly susceptible to wavelengths withing the blue region of the spectrum.

Ideally, all of the wavelengths above 800 nm and below 400 nm should be filtered out, and this can be done without compromising visual performance. The problem lies in the 400- to 500-nm light range. Filtering out 100% of wavelengths of light below 500 nm would eliminate 98% of risk for retinal phototoxicity. However, blocking wavelengths between 400 and 500 nm yields a yellow hue to the vision, which many individuals will not tolerate, thereby risking poor compliance. Therefore, these wavelengths of light may need to be attenuated rather than eliminated. So the blue light is attenuated to 60% of other color energy level.


Electro magnetic radiation is much less than international standard

On/off dimming is not used, so there is no on/off flicker light.