Here is the link for their hours and the days they are closed.
B&H Photo Video Hours of Operation
Be aware, on the day before any holiday or Friday evening, they will close at the posted time.
No lines at the cashiers, no staying open for that last sale.
They will start shooing you out 20 minutes before and, on the dot, they are done.
I don't know where you're from or how much experience you've had with the ultra Orthodox Jews (
Haredi Judaism - Wikipedia, the free encyclopedia) but most of the sales people, from their dress, seem to belong to the same branch. At closing times, there is a stream of like-dressed men coming out of the employees entrance. In the store they are sort of New-Yorkers but generally very cordial and pleasant. They schmooze a lot with others when the store is quiet but don't hesitate to break in and ask a question. They are super-professional and knowledgeable.
There is a large room, sort of a semi-exit, after one passes through the exit doors where you can get your packages into bags or unpack your new stuff. I sat there for a few minutes to watch the flow. It is flabbergasting to consider the amount of stuff they process through there every week.
The lighting department alone is the size of a 7/11.
If you have a specific question that can't be answered by the website, post it here and the BH rep will usually find it.