The Spectronics XX-15F benchtop ultraviolet (UV) lamp has two 15W, 254nm unfiltered UV tubes with glass filter and operates on 120V. It measures 3.5 x 18.75 x 4.5 inches/8.9 x 47.6 x 11.4cm (H x W x D, where H is height, the vertical distance from lowest to highest point; W is width, the horizontal distance from left to right; D is depth, the horizontal distance from front to back).