... Use only the exact spectrums (R&B) required for plant photosynthesis4) Built-in cooling system (thermostatically controlled fans ) solve the heat ... WavelengthBlue 450~460nm,Red 620~630nm,660nmApplication:Suitable for the plant -breeding house, garden, farm, green house, horticultural park ... exhibition because it can stop the growth of the plant, in this way, can widen the application of this item ...