well actually.. i dont suppose it really would matter? vegging plants can receive as much light as possible and be ok but it arises a couple questsions....
will the heavy flux of the intensity of light be strong enough for the plant to not only recognize but be confused by? (confused plants may hermie themselves under different types of stress)
because more root growth happens when there is less photosynthesis (dark cycles) is there still going to be more root growth if the plant receives a fraction of the light (and thus less photosynthesis) it is normally used to having in its light cycles? (the idea of darkness during veg is to promote for faster growth of roots, so would this excess of light entirely negate the reason of using a a 6/18 off/on schedual?)
very good questions to consider, but of which i do not have the answer.. all about personal speculation