Optimal plant growth: Philips LED plant grow light mimics the sun’s spectrum and provides the optimal light spectrum, helping grow strong and vibrant plants. Product does not emit UV Rays 50 degree beam angle: The 50 degree beam angle of the Philips LED plant grow light is preferable to narrow beam angle lamps, as it evenly lights The whole plant with the appropriate amount of intensity promoting optimal healthy growth Energy efficient: Philips LED PAR38 grow light bulbs have an estimated annual energy cost of 1.87 dollars. Philips LED light bulbs are mercury free and energy Star certified Long lasting: these Philips LED bulbs last 13X longer than incandescent and halogen bulbs. Each light bulb is expected to deliver a lifetime of up to 25, 000 hours of light (based on three hours per day), saving you the cost of frequent bulb replacement Compatibility: these Philips LED light bulbs fit in E26 medium screw bases. Not compatible with Philips Hue products. Philips LED PAR38 grow light bulbs are for non connected use only