Luxrite C7 Blue Candelabra Base (E-12) LED Light Bulb (12-Pack) in the Decorative Light Bulbs department at Lowes.com
25 Pack C7 LED Blue Light Bulbs, Halloween Christmas Replacement Bulbs C7 Blue Ceramic Lights for Outdoor Patio Indoor String Lights, C7/E12 Candelabra Base, 0.6W LED Small Night Light, 120 Volts -
EZLS C7 Blue LED Bulbs - 5 Pack Smooth Lens Blue Transparent C7 Replacement Bulbs - Amazon.com
C7 120V Blue LED Replacement Bulbs - Wintergreen Corporation