Well 'they' say to harvest in the early morning. Right after lights on.
It would only stunt them if you were intenting on growing them longer. If you plan to harvest all at once then no.
Another thing I advise; it would be best if you only cut one or two at a time. Otherwise you'll have a shit ton of product to trim through, and it will rattle your nerves.
But now that I think about it, if you trim while they're alive, then all you have to do is cut & hang.
No tedious trimming required.
Get us some close-ups with a white light on them. Like a 6500k cfl or something, so we can see true colors.