Lowes offers GE 100-Count 24.7-ft StayBright Warm White LED String Christmas Lights for $2.50 (reg. $9.98) with free shipping. 

Product Description:
GE StayBright LED 5.5mm traditional miniature 100-count warm white light set. 3-Inch lead wire, 3-inch lamp spacing, 3-inch end connector plug, 24.7-feet lighted length, and green cord set with fused plug.

• GE 5.5mm LED Christmas string lights
• 100-Count, warm white StayBright LED lights
• 24.7-Feet lighted length, green cord with fused plug
• Can connect up to 25 sets
• Replacement bulbs and fuses included for added convenience
• For indoor or outdoor use