I have 4 hours before the lights have been off for 12 hours to decide what to do, could anybody give me a suggestion?

I think I am going to change the bulbs over to flowering but as I only re-FIM'ed 2 of them yesterday I guess this is not to great.

But.....

How would the girls react if I put the 6500k bulbs back on 17/7 for a few more days after the 12 hours darkness?

Would I be better off leaving them off for 36 hours (this is something I have read in these forums) and changing the lights over before they come on?

please help, power problems is not something I have read on these forums!