With a balanced spectrum to obtain the ultimate growing power, the ROI-E420 LED Grow Light is the right indoor growth system option. You get a full spectrum covering a more comprehensive range of wavelength to protect more than 660nm.With better radiant energy, the 660 nm range operates between 3000 to 3300K. It gives a more realistic color promoting the natural growth of plants.With the ROI-E420, you have full control over the intensity. So, you can set just the right conditions for photosynthesis. Moreover, a more comprehensive compatibility