Timer malfunctioned (flowering stage) Help!!!

[Comfortably Numb]

My timer did not turn my 600 watt off after the 12 hr. cycle so the light was on for 21 hrs. before I found out.What will this do to the plants flowering?They are in their 3rd week of flower.Did a search not satisfied with results so I could use a knowledgeable answer.Not real happy at the moment.Turned timer off-on its reprogrammed and it will recycle at the times I set.

 

[pyroguy]

ive had it happen before just watch them one time shouldnt be to detramental, but again just keep a close watch

 

[BizzyHigh]

It's possible that the extended light outage will through your plants into a bit of confusion and cause some minor stress but it seems you caught this little malfunction before more serious harm was done.. So hold your fingers and pray for no stress related hermies.. I think you'll be fine though.. I would recommend starting them out under 12 hours and stick to that new light cycle and hope for the best Good Luck!