Lowes offers Green Watt 6 -Pack 18-in Plug-in LED Under Cabinet Light Bar for $74.99 (reg. $99.98) with free shipping. 

Product Description: 
Light fixtures installed directly underneath your cabinets illuminate the countertops below for safer, more functional food prep and brighter small-appliance storage. Under-cabinet lighting is also considered a decorative element since the lower height of the light can show off a backsplash pattern better. Additional areas of light can make the spaces appear larger.

• Green Watt 6-pack 18-in LED Linkable bar light
• 900 Lumen brightness in 4000K cool white light color
• Long lasting, energy efficient LEDs provide a smooth light output have a rated life of 50,000 hours
• 10-watt Low power consumption
• Installation is a breeze; Mounting screws and double-sided tape are included.
• Linkable - Extendable design, connect up to 10 lights together with 1-ft connector cord included
• Perfect for under cabinet, storage area, workbench, basement, home, or office general lighting.