light cycle). Each
treatment and control was repeated for three times. Its parameters were cell number, chlorophyll and carotenoid content. The
number of cells was counted by Haemacytometer Neubauer 1 mm and chlorophyll, and carotenoids content were analyzed by
spectrophotometry at absorbance of 700, 663, 645, and 478 nm. The combination of ultraviolet and blue light was the best
treatment for increasing the total carotenoid and chlorophyll content since the total carotenoid content increased about 8 times of
the control and the total chlorophyll content increased about 2 times of the control