Modern Classic Adjustable Swing Arm Desk Lamp Table Drafting Light Home Office Vintage Decoration Table Lamp Clamp Light IP6 The lamp arm is jointed in three different places: at the base, half way up the arm and the lamp head. It allows you to easily adjust the light in almost any position. The lamp can be adjusted to an overall height of 1.77 feet. The weighted base is more than enough to keep the lamp stands firmly. Stand on its own or clamp on a table are all available. The max opening of the adjustable c-clamp is up to 1.77 inch, and it can be clipped onto almost any table, shelves that are vertical or horizontal. With an E26 sized screw base, the bulb can be installed as desired. You are allowed to install a bulb that is suitable for the E26 screw base and the maximum permissible wattage of the fuse is 100W. With qualified metal material on the lamp arm and lamp head as well as the black painted shell, its a durable and delicate addition in your desk. Note: The clamp is made from plastic material.