Adesso 3650-01 Maestro Balance Arm Desk Lamp, Black The Maestro lamp has a thin balance arm that pivots from double rods The metal shade is vented and has an acrylic casing down to the glass bulb shield Shade: 3.5" Length, 1.75" Widest diameter Height adjusts from 7" to 18". 17" Depth. Balance arm has 14" Length and pivots at 6" from base Three 1Watt LEDs