... (7:1:1)LED Configuration90*1W(70 Red + 10 Blue + 10 Orange)No Type Unit Parameters 1working environment °C -20 ... we recommend use of 620-630nm and 640-660nm, blue wavelength using the 450-460nm and 460-470nm. red ... light to promote plant germination, flowering, blue to promote plant growth, you can choose a more ... the customer, we recommend that the ratio (red: blue) 8:1, 7:2 and 7:1:1, red ...