Detailed Product Description Feature : 1) 90 X 1w led grow light produce great effect as 400W to HID grow light save 75 electriciy.2) Lifetime reaches 50,000 hours.3) Use only the exact spectrums (R&B) required for plant photosynthesis4) Built-in cooling system (thermostatically controlled fans ) solve the heat dissipation excellently 5) Built-in power supply, CE approved, No setup required, just ...