the sunlight, even simulated using a xenon lamp and the filter set for a few minutes kills the SARS-CoV-2 on different surfaces. This is stated in an article published in the American journal of The Journal of infectious diseases (the Journal of infectious diseases – approx. ed.).
As it was clarified earlier, coronavirus on various surfaces in the room halfway, weakened over 7 hours at a temperature of 23 degrees Celsius and 40 percent humidity, but may persist for days.
Scientists have studied the effects of sunlight on the coronavirus on the steel surface. Simulated using a xenon lamp light killed 90 percent of the viruses in 6.8 minutes in particles of saliva deposited on steel, and 14.3 minutes in a nutrient solution applied to the metal surface. For this velocity impact, the article says, you need light, like what comes from the Sun in clear weather at 40 degrees North latitude. If the light intensity is lower, then the virus will die more slowly.
As noted in the article, this is the first study showing that sunlight helps to inactivate the virus on various surfaces.