Figure 4.13 as show average of physiology (%) in different light period condition in WH-T8 light source by the x axis is light period (0, 6, 12 and 24 hour) and the y axis is average of physiology (%). The result show that 24 hour in light period treatment (96.35%) was the highest than other light period of average of physiology (%). Light period of 0, 6 and 12 hour were 83.46, 61.06 and 65.25 %, respectively.