Alvin G2540-D Swing-Arm Lamp, Uses Bulbs with E26 Screw Base Up to 100W Which Can Also Be LED or CFL, Bulb not Included, Spring-balanced Arm, White Color Ventilated 6 1/2" diameter metal shade with double baffle to reduce glare Spring-balanced arm locks securely in any position with a 32" extension Two way mounting clamp for tables up to 1 1/2" thick Under 10" Shade Size Uses Bulbs with E26 Screw Base Up to 100W Which Can Also Be LED or CFL, Bulb not Included