... , 7:2 , 7:1:1 6:3:1 with the mixture of red , blue , orange ,ultraviolet, ... most suitable for your plant growth. 4. Built-in cooling system (thermostatically controlled fans ) solve the ... in power supply, no reflector & ballast needed, ranged AC85V-264V.6. Right for all phases of plant growth, and works well with ... , flowers etc.2. The lights can be used in greenhouses, estates, gardens, etc. notice:1: We ...