It's not common, but it happens.
Ideally, it is customary to tell OP why one votes to close their question, unless someone else has already done so in the comment section.
Personally I try to do this, but sometimes I don't. This is especially true when voting through the review queue. There is a finite but not zero chance that I don't, and multiply this by five close-votes there is still a finite but non-zero chance that a question is closed without commentary. In this case, that happened to your question.
Ultimately it's up to OP to construct a question that can be answered by the community, and while it's polite to comment on a close vote, it's IMO not mandatory.
Why was it closed?
I didn't vote to close your question, but I remember seeing it and immediately wondered how it's even a question - you bought an LED that flashed at a specific documented rate but you don't want it to do that. I couldn't understand how you wanted us to explain "don't buy that LED" and quickly skipped the question. If you think that I misunderstood your question - bingo! I'm sure I'm not the only one.
You must understand that closing a question isn't a punishment. It's to protect the question from useless and diverging answer. Imagine that someone had answered your unclear question. Now someone else answers the question but interpreted differently. Who's right? Then you edit your question, maybe once, twice, more. It's a mess, question gets downvoted, you can't ask again because that would be a duplicate.
Instead it's closed so you can edit your question and have it reopened so it can be answered correctly.