Fully adjustable, articulated arm structures in extruded aluminum. Joints and tension control knobs in polished die-cast aluminum. Tension cables in stainless steel. Internal tension springs and external tension control cables in stainless steel. Tiltable diffuser in stamped, anodized matte aluminum or polished aluminum, rotatable 360 degrees. Base in weighted steel with stamped aluminum cover. Table in-set pivot and table clamp in die-cast aluminum. Switch on lamp holder body.