Yes, leaves will become a bit rough over time.... You canover ligh pants.. very hard to do.. and as Lady said tehy will appear bleached.. the cool thing is, that when you remove the light the color comes back to the leaves... they don't beocme necrotic..

This happens in nature sometimes to plants at very high elevationns..

Like vapor dame said - i wouldn't worry.. unless you like to worry... I don't mean to tell you what to do..

i love you