can you send a picture of the growth tips so we can see if it looks like you are in bloom? Lots of white hairs could mean different things to different people.
I am not sure what the 24 hours of darkness is going to do other than further confuse the plants. It would have been best to simply correct the error and then proceed as if nothing was wrong... now you have added another error for the plants to have to process.
If you are 5 weeks into this 12/12 and still don't have buds, then you can be assured that you are not in bloom. If you are only 5 weeks into the life of these plants, then they have just barely started to even be mature enough to bloom.
Your light mishap may have kept them in veg mode. This is not a problem, you simply have larger plants now, and now that you are giving them a true 12/12 pattern, they should start blooming soon.