Fluorescent lamps are the best choice because incandescent light generates too much heat for the amount of light produced. Many flowering plants grown in commercial greenhouses are not grown at constant temperatures. Most plants do well in bright spots with a temperature of 65 to 75 degrees Fahrenheit in the daytime and 50 to 55 degrees Fahrenheit at night. The cooler temperatures slow the deterioration process down and help extend its decorative life. Remember that during the winter the temperature near the window is considerably lower than the rest of the room.
Drafts can be a serious hazard for plants in the winter.
Cold air from an open door, as well as heat from radiators or air vents, can chill or overheat a plant. Avoid any extremes in temperature. In the excitement of the holidays, you may forget to water your gift plant. Remember that indoor air is quite dry and the plant will dry out quickly. Also, flowering plants tend to dry out quicker than foliage plants.