①. This device features a 58W UV-C (253.5nm wavelength) spectrum lamp designed for disinfecting rooms and surfaces, applicable to areas where viruses, bacteria, or mites may be present, such as mattresses and bedding. It includes an ozonation function for disinfecting areas not reachable by UV light, requiring room ventilation after disinfection. The device is equipped with a remote control and a delay timer to allow safe exit before operation. It should not be used when people, animals, or plants are in the room, as UV-C rays can be harmful to human vision and skin. The device's power is suitable for use in a 60m² room. ②. Ultraviolet rays are part of the electromagnetic spectrum, similar to X-rays, radio waves, and light rays. Practically, they are divided into three ranges: UV-A (long-wave, 400 - 315 nm), UV-B (medium-wave, 315 - 280 nm), and UV-C (short-wave, 280 - 100 nm). UV-A rays from the sun trigger photochemical and pigment-forming processes without erythema-causing effects. UV-B rays are used in therapy, aiding provitamin D production and causing pigmentation and erythema. UV-C rays have strong germicidal and embryogenic effects, potentially leading to skin burns (erythema) and eye conjunctivitis. They can be generated by bactericidal lamps through electric arcs in low-pressure mercury vapor (germicidal emitters). ③. Ultraviolet rays with a 200nm wavelength can generate ozone in the air, which is harmful. To prevent this, the germicidal bulbs in these lamps are coated with special quartz glass that allows high transmittance of germicidal radiation while absorbing unwanted ultraviolet rays below 200nm. ④. The air purification process involves internal and external emitters (for air and surfaces). Studies show that ultraviolet rays with wavelengths between 250 to 270 nm exhibit maximum germicidal effect. This effect occurs when nucleic acids and proteins absorb ultraviolet light, stimulating chemical reactions in cell nuclei to destroy microbes. The bulbs in these lamps emit maximum germicidal energy within the 250-270 nm range. ⑤. A - Maximum bactericidal effect is achieved by UV-C radiation in the 250-270 nm wavelength range; B - Nucleic acid absorption curve; C - Cosmic radiation following low-pressure mercury leakage. ⑥. Bactericidal lamps are used as a method for air disinfection, emitting UV-C radiation around 253.7 nm to destroy bacteria, viruses, mold, fungi, and various microbes, contributing to a clean indoor environment. UV-C rays are applied in settings such as operating rooms, procedure rooms, obstetric wards, quarantine rooms, dental offices, polyclinics, laboratories, pharmacies, pharmaceutical, food, and cosmetics industries, hotel industry, culinary arts, kindergartens, schools, and taxi and passenger transportation. ⑦. The instructions for using the lamps should be thoroughly reviewed and followed. The number and power of lamps required depend on factors including room height, shape, surface reflection coefficient, temperature, humidity, and air dust level.