New device produces a bright, warm light with even less blue wavelength emissions than natural candlelight.

Replacing standard lighting with UV-LED lights could be a powerful tool in stopping the spread of Covid-19.

Waste rice husks are an excellent source of high-purity silica and value-added Si powder.

This new approach represents an important step to the commercial application of PeLED lighting.

Compared to the conventional aluminum gallium nitride, the new material has significantly higher efficiency of luminescence.