What lights are you using and how far away are they?
Do you have a fan or heater blowing near this plant?
What's your PH in/out and PPM?
Have you been feeding? If so, what have you been using and how often?
What medium are you growing in? Soil? Which kind?
What's your temp and RH?
Mars Hydro 600.
24 inches away.
6 inche fan at top corner of my tent and no heater blower near my tent.
PH 6.0/ 6.5
just water. natures living soil and happy frog
75-79 f / 65 RH
Do you have pest?
Looks a lot like variegation but it looks excessive compared to all other plants I've seen with it. If you can give us some more information then we can dig into it more.
More info on variegation: https://www.mrgrowit.com/post/variegation-in-cannabis-plants