If light is insufficient, variegation may be lost. Flowering plants also require higher light intensity. As winter approaches, light intensity and duration will diminish. A plant that grew well in an eastern exposure in the summer may require a southern exposure in the winter. Move plants to other locations seasonally if needed.
Plants utilize all colors in photosynthesis.
An incandescent light bulb emits limited colors and is not acceptable as an indoor lighting source for plants. To grow plants under artificial fluorescent light, most indoor gardeners combine a cool and warm tube in a fixture to provide light of good quality for many interior plants. Duration refers to the length of light exposure. A daily exposure to light, preferably 8 to 16 hours, is needed for plant processes. Air temperature is quite variable within a home or office and can change daily or seasonally.