24 hour light to 16/8

hey... have a question here. uh....i had my plants on 16/8 hour light for the first week and a half, then after i transplanted them i switched to 24 hour light to get them going again. its week 2 and 1/2. should i switch back to 16/8 light or just leave it at 24? if i should switch, how should i do it, gradual or all at once?
peace

I personally use 18 hour of light.
And when I change the time I do it gradually 1 hour a day

changing the light patterns will confuse the plant and encourage hermies