Etekcity via Amazon offers the Etekcity 3-Level Wireless Dimmable Color LED Desk Lamp for $19.99. Coupon code "MX9CGEIO" cuts it to $15.99. Plus, Prime members bag free shipping. (Non-members can spend $35 or more to qualify for free shipping; otherwise, shipping costs $8.95.) That's $18 off list and the lowest total price we could find. It features three levels of brightness, color customization, a flexible neck, and a USB charging port.