Domino Peace Lily plants are known for their beautiful white and green variegated leaves. However, if you notice your plant is losing its variegation definition, this could be because they are in an area of your home that is poorly lit. If your houseplant is in low light spots of your home, its variegation will dull and fade because it is not receiving enough sunlight. Variegated plant leaves have less chlorophyll than regular plants, meaning they need more bright, indirect sunlight to thrive than other non-variegated plants do.