... . color: red,blue,orange etc 3. spectrum 120w panel led grow light : 1. 120W LED grow light can replace 800w HPS , over 80% energy saving . 2 ... stage , The suggested wavelength are red (620-630nm) , red(640-660nm) , blue (450- 460nm) , blue (460-470 nm) , You can ... wavelength and color ratio which is most suitable for your plant growth. 4. Built-in cooling system (thermostatically controlled fans ) ...