... 3) Use only the exact spectrums (R&B) required for plant photosynthesis4) Built-in cooling system (thermostatically controlled fans ) solve ... uniform leaf coverage 9) Ideal for all phases of plant growth, and works well with any indoor garden, whether ... WavelengthBlue 450~460nm,Red 620~630nm,660nmApplication:Suitable for the plant -breeding house, garden, farm, green house, horticultural park etc ...