With the incident sunlight passing though the plant canopy, the amount of light reduces due to the absorption and reflection by leaves and there are also qualitative changes in transmitted light. The present work examined light intensity, spectral quality and phytochrome photoequilibrium as influenced by the number of leaf in chrysanthemum (Dendranthema grandiflora Tzvelev) cv. Puma. The photon flux of sunlight increased rapidly from 300 to 500 nm and remained relatively constant above these wavelengths and had approximately equal photon flux of red and far-red light. As the number of leaf increased, photon flux in 300-800 range was decreased rapidly but photosynthetically active radiation in 400-700 range attenuated more rapidly with less than 3.0% to near 0%. There were also changes in light composition. The light transmitted by leaves was predominantly far-red light and as a result, the red/far-red ratio decreased. Such results led to changes in phytochrome photoequilibrium. Phytochrome photoequilibrium of incident sunlight was 0.72 but decreased 0.26, 0.12, and 0.09 with increasing leaf number.