3 things I see.
1) light has been to far away leading to allot of stretch.
2) The leaf in question on your opening post looks like a lower fan leaf that might have gotten up against a bulb, if it is and only leaf affected then /snip ......... Next!
3) How long have they been 12/12?? I really have to agree with OM and say what budsites? I see some flowering but not buds.

Hey OM how ya doing??