Heat and humidity play a large role in rate of transpiration. If a plant is continually left in the light or in the path of a fan (wind), then it will lose the most mass through transpiration out of all of the plants because light promotes more photosynthesis to occur, which requires the intake of CO2 and the release of water through the stomata. Also, with the wind blowing on a plant, all of the humid air is blown away, leaving the air around the plant dry; therefore giving the plant more water potential to leave the stomata and evaporate into the surrounding environment. With the wind constantly blowing the humid air away from the plant, there is always a high water potential, making the plant lose more water through transpiration. If a plant is left in the dark or misted with water daily, then it will lose the least amount of water through transpiration