with the same success could buy an ordinary diode for 200r Different pros: a lamp like a lamp. I’ll add a year has passed 30% of the lamps somehow died, I noticed another oddity - roughly only about 30 lamps I stuck half of them connected to the official application about a year later, almost simultaneously, blinking then shining somewhere by 1/4, about a third or more died they don’t die, but the same lamps from the same box screwed in in a country house where parents live and not connected to the application work without problems at all, such are the Chinese businessmen. Cons below: if God forbid you decide to connect it to the official application, you will have to learn shamanic dances with a tambourine and the Chinese Kama Sutra, because you won’t find a more crooked application than crap, they even did public services .