if it's day 6 then she should still have sufficient nutrients coming from the seed.. do you know the PH and EC of the water you are feeding her?
also did you spray her while the light was on?
i might be wrong, but it seems like there could have been water-spots on the leaves, while she was in the light (kind of like the magnifying effect in the sun), which could have burnt some parts lightly, hence the mosaiquing of the colors..