In spectra of LED(white,blue,red,green,blue and red,green and red) with different photosynthetic available quantum flux densities the diatom Skeletonema costatum and dinoflagellate Prorocentrum lina were cultivated to investigate the effect of wavelength on the growth of the two dominant species of red tides.It is concluded that in the same photosynthetic available quantum flux density,for monochromatic light,cell growth rates of Skeletonema costatum and Prorocentrum lina are the greatest in blu...