Abstract：Taking the seeds of‘Kuoyekongxincai’as test material，this paper studied the growth response
of water spinach sprouts to LED light intensity and light quality．The results showed that the shelling rate of
L₇₀₀₀RBW4∶1∶1（light intensity 7 000 lx，red light∶blue light∶white light=4∶1∶1） was significantly higher
than that of the other treatments at the end of greening stage．When light intensity was 7 000 lx，the dry weight of
edible part treated with 3 light qualities was significantly higher than that of white light control．Overillumination
would remarkably affect chlorophyll accumulation．Under high light intensity（L₁₁₀₀₀），the content of chlorophyll
a，chlorophyll b and total chlorophyll decreased with the increase of red light ratio，and the albinism of cotyledons
became more obvious．Under different light intensity，the ascorbic acid content of the 3 light quality treatments
decreased with the increase of red light ratio，but there was no significant difference in soluble sugar content
among the 3 light quality treatments．The results of principal component analysis showed that L₇₀₀₀RBW4∶1∶1 had
the best performance under the experimental conditions，and it was a suitable LED light source formulation for
industrialized production of water spinach sprouts．