These SANSI LM301B Diodes light-spectrum coverage 380nm-780nm, 660nm, 730nm, 3000K, 5000K, offering more power for your blooms and maximum PAR output at various distances. The cool 5000K white light promotes germination rates, the warm white 3000K light speeds up blooming time and the red 660nm light improves the plant production. The lights can get through the surface of plants and deep into them to increase yields.