Figure 4.11 as show total phenolic compound 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 total phenolic compound (mg GAE/g). The result show that 12 hour in light period treatment (65.25%) was the highest than other light period of total phenolic compound. Light period of 0, 6 and 24 hour were 5.99, 6.23 and 5.70 mg GAE/g, respectively.