The 3 constant for a plant grown in different varying light is the duration of light, the intensity of light and the quality of light like wavelength example green light, blue light or red light growth pattern.
Plants behave differently in 30 days light pattern. There are few plant species that need more dark and less time in the sunlight. These plants are called the short-day plant
There are few plants that need more light. These types of plants are called long-day plants. these plants require more time of sunlight and less exposure to the dark.
Plants have receptors that are sensitive to exposure to light. So, the intensity, the duration of light and the wavelength that colour of the light matter. As plants show maximum growth in a particular wavelength of light.
Hence these are the constant factor of the plant that grows in varying light conditions and they are duration, quality and intensity.
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