plants are wiltting about the same time ???

some1 help plz, repotted few days ago and since this ive not around the same time (8pm to 9pm) the plants start to wilt..... next morning when the lights are back on the fine....... standing nice.., there on 18hours on 6off. the light are on from 5am to 11pm off 11pm til 5am... there have a nice colour to them but still wilting, there under 2 400watt light at the min,
only changes to the system since the wiltting start is the repotting and extra light....

ive been told the plants no the lights not long til going off which is why they start droppin

any ideas??

if the plant comes back don't worry about it i'd say.

It's just sleeping when lights are off, as long as it purks up when lights on you're OK.