Motive (PlantSim)
Sunlight is introduced in The Sims 2: Seasons Expansion pack as a PlantSims motives. It basically works like a Sim's Hunger need, if a PlantSim is not exposed to sunlight the need goes down. Players can raise the need by either exposing the PlantSim to sunlight by taking them outside or by putting them near a window. If it is night time a Sun Lamp can be used to restore the motive.