Ring light body size:5.31 inches /13.5 cm diameter halo shaped plant growth lamp. Metal base dimensions:5.9inch/15cm.Suitable for indoor potted green plants, full spectrum of simulated sunlight, give your plants like the natural soft light, promote plant photosynthesis, let plants grow healthier, more lush. Easy to install: no tools, two-step installation, and two ways to use. 1. First connect the lamp to the metal support rod, and then the support rod can be fixed by directly inserting the pot/soil. 2. A 2nm/0.08inch thin metal base can be attached to connect the support rod to the base and place on the ground. Automatic timing switch: The lamp has its own timer, with three modes of cycle timing function, can set the daily continuous irradiation time, 8 hours /12 hours /16 hours three modes to choose, also can choose manual switch. When you turn on the light for eight hours, it will stay on for eight hours and then go off. After 24 hours, the lights will remain on for eight hours before going off again. Adjustable height andamp 157inch/4m Line length: The lamp height can be adjusted up and down through the telescopic support rod. The height adjustment range is 16-59 inches /40-150cm. 157inch/4m wire length for a wide range of applications. 10 level dimmerandamp The irradiation Angle can be adjusted: 10 brightness adjustment modesandamp The gooseneck tube is added to adjust the irradiation Angle arbitrarily