Japanese firm launches world’s first UV lamp that safely kills coronavirus


Major light-maker Ushio Inc. has recently launched an ultraviolet lamp that can kill the coronavirus without harming human health — the first of its kind in the world.

The Care 222 UV lamp, which Ushio developed together with Columbia University, is expected to be used for disinfection in spaces where people keep going in and out and the risk of contracting the deadly virus is high, such as on buses, trains and elevators and in offices, the company said.

UV lamps have been widely used as an effective means of sterilization, notably in the medical and food-processing industries. But conventional UV rays cannot be used in spaces where there are people, as they cause skin cancer and eye problems.

Ushio’s new lamp, however, emits UV rays with a wavelength of 222 nanometers, as opposed to the conventional 254-nanometer wavelength, making them lethal to germs but benign to humans.

At this particular wavelength, the firm said, UV rays cannot breach the surface of the skin nor the eyes to bring about cancer-causing genetic defects and other damage.

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