Adjustable Lighting Cocoweb Picture Lights are meant to adjust to work for every situation. The adjustment screws on each end cap allows you to rotate the light bar for the precise lighting angle, as well as tighten it to prevent the shade from moving for any reason. The arms of this light fit into channel brackets than can be mounted directly to the back of the frame, or the wall behind the frame. This channel bracket allows height of the light to be adjusted, allowing you to light up a taller piece of art by getting a higher angle looking down at the painting. Integrate LED Lighting Cocoweb is proud to say that all of their lights do use an integrated LED lighting array (bulb), that completely removes the headache of having to worry about replacement bulbs for years. The includes LED strip is rated to last over 50,000 hours, which is about 20 years with average use. Another benefit from our LED lighting is that each node is evenly spaced, distributing an even glow of light across the painting with no hot spots or unlit areas. Also LED's generate very little heat, and no harmful UV rays protecting your artwork from cracking or fading throughout the years. Full Range Dimming Capabilites Each picture light should include a full range lighting dimmer allowing you to provide the perfect amount of light to each art piece. If for some reason you do not get a dimmer with your light, please contact Cocoweb and we will be happy to send you one at no extra cost. Plug-In Adapter This light is powered by a common 100 – 240VAC US Type A plug adapter with a 10 foot cord.