The HQRP LED Spot Plant Grow Light is the perfect tool in growing plants to maximum health and full potential. This LED light technology has been scientifically proven as a crucial tool in providing plants with essential elements and enhancing the photosynthesis process. The combinations of Red and Blue LED lights have been formulated to provide a beneficially synchronized effect on the plant. The Blue LED lights (430-470 nanometers) provide peak chlorophyll absorption in the plant, promoting vegetative growth. The Red and LED lights (610-680 nanometers) cause large absorption of nutrients by chlorophyll, most critically influencing the photosynthesis process, which in turn promotes budding and flowering.HQRP UV Radiation Meter: This meter shows you the level of UV radiation and helps you protect your eyes and skin from negative sunlight effect. The color of the meter changes from very light purple to dark purple depending on the intensity of the UV lighting. The darker the purple color is, the more intense is the UV lighing.