Technically roots shouldnt be exposed to light, ever, but although we all say that many plants can happily live with the lights on their roots.

The main thing is, in real life roots never have contact with the sun because they're underground. In a grow room thats what your trying to re-create.

Personally i wouldnt let my roots ever see the light, apart from when i transplant. Good luck
LIP Reviewed by LIP on . Roots question What would happen if the roots met with light?? How does light affect the roots?:) Rating: 5