1. 55*3LED grow light can replace the 3-5times HPS, saving over 80% energy 2. Base on the 3w LED light source. 3. Over 50000 hours. 4. Our common light ratio :8:1 , 7:2 , 7:1:1 with the mixture of red , blue , orange ,yellow and white lights , or customized as your requests 5. Our suggestions on the wavelength are red (620-630nm)or (640-660nm) , blue (450- 460nm) ,or (460-470 nm) , Blue LED can easily be added to enhance vegetative growth , red LED are good for promoting the fruiting and flowering You can choose the wavelength and color ratio which is most suitable for your plant growth . 6. Built-in cooling system (thermostatically controlled fans) solve the heat dissipation excellently 7. Built-in power supply, CE approved, No setup required, just simpler and safer plugs directly into AC85V-264V, no reflector & ballast needed. 8. Ideal for all phases of plant growth, and works well with any indoor garden, hydroponics or soil based.