Hang my clothes lay in the sun,  the use of which the ultraviolet disinfection. Everybody knows that. Well done. Hoo-rah.  But I still have doubts that the ultraviolet disinfection is probably a little andfiniteBut in recent days of an experiment, let me taste of the power of ultraviolet rays in sunlight! (Of course, the experiment is not to measure ultraviolet).
Recently, we manufactured it —–PCB with photographic blue oil, To the exposure, I do not have use UV LED strip. When exposure, I no ultraviolet light – follow www.ledlightmake.com  production of information, just need a few minutes with 8W UV LED to exposure. Other Information also mentioned that if user no have ultraviolet LED light, you can use sunlight or energy-saving lamp to exposure. First I chose to use 12-watt energy-saving lamps to exposure. after 5 minutes, but no effect.Then we had to choose sunlight exposure. The first time to use Sunlight  no experience, the sun for 5 minutes, the exposure is over, 2 minutes is the best time of exposure for PCB.I can’t believe 2 minutes did this. We  would think that PCB stayed there for half an hour.