... metal cover , built in 6 pcs 45w constant current source , it will be more energy efficient 2 ... to enhance vegetative growth , red LEDs are good for promoting the fruiting and flowering stage , our suggestions ... wavelength and color ratio which is most suitable for your plant growth 6. Built-in cooling system ... 264V, no reflector & ballast needed.8. Ideal for all phases of plant growth, and works well ...