phive led desk lamp, architect clamp task table lamp, 20w super bright extra wide area drafting work light, 4 color modes, 5 brightness levels - great for workbench, office, studio, reading, monitor phive <b>installation guide</b><br>please attach the led light bar to the stem, then tighten the screw. <br> <br>if you have any question about the lamp, please don't hesitate to contact us. <br>we provide excllent customer service to make sure your satisfaction.