Abstract
The combination effects of fluorescent colour lamp for the growth of tomato plant (var. Fukuju 2) were investigated.
Under the combination of red and blue fluorescent lamps, the growth was maximum when the ratio of red reached to 80-88 percent of all radiant energy (Fig. 1-5) .
In this combination, if a part of red was exchanged to orange light in order to spread the range of wave length, the growth of tomato plant became smaller. (Table 1) .
By this experiment, it became clear that the range of red wave length was not need so wide.
The addition of green light to the maximum growth ratio of red and blue light did not ircrease the growth.
So, it is recognized that the green light has no effect for growth of tomato plant (Table 2) .
