Amazon.com: O'Bright LED Clip on Light for Bed Headboard / Desk, Dimmable LED Desk Lamp with Metal Clamp, 5W LED, Flexible Gooseneck, Adjustable Brightness for Eye-Care Reading, Vintage Design (Metal Black) :
White Spot Clip Lamp or Sconce 1980s / Loft Lighting Vintage - Etsy
Clamp Desk Lamp - Ideas on Foter
Darice Cleveland Vintage Clip On Lampshade, 8” x 7” x 4.5” - Walmart.com