The large size of the Vertizontal reflector provides a wide area of coverage from low mounting heights and will accommodate all sizes of lamps. Low mounting height reduces distance to plants and thus increases light levels. The advantage of horizontal reflector is that HID lamps emit light in a continuous 360° ring emanating out from the arc tube. The main reason horizontally mounted lamps perform better is because much of their light is thrown downward. The center is made of 95% reflective German pebble aluminum which increases the light output due to enhanced diffusion properties. Light output is also enhanced by this eight sided parabolic shaped reflector. In the horizontal burning position, much of the lamp’s light is thrown straight down and the balance of the lamp’s light which is emanating upward is re-directed back down in eight different directions simultaneously due to the unique shape of the center piece. The Vertizontal also features the Adjust-A-Socket mechanism for horizontal and vertical lamp adjustment. Details: Dimensions: 46” diameter x 10” deep