Leafs are Sagging

It's been two days and i just started the 12/12 and they were doing just fine when the lights were on 24/7 r they in shock or something also its been kinda cold in the room there in it looks like they were over watered but its been 5 days since then.... need help

got any pictures?

I think you may have answered your own question...I could easily see how your plant may seem less vigorious in low temp, high watering conditions.

I only water them once a week n so the cold temp is Wats causing them to look saggy how should I fix this??????

Well how cold is it getting? If you're talking 55 degrees or less for prolonged periods, it could be the cause.

Are the leaves otherwise healthy color-wise? No spotting, curling, etc?