Sopco Christmas Replacement Mini Light Bulbs 2.5 V 0.17 A Clear Glass Bulbs with Green Base for Christmas Trees Incandescent Lights(50 Pcs) - Amazon.com
J Hofert Mini Clear 12V/14V Replacement Light Bulb (5-Pack) - Jed's Hardware & Garden Center
612 Vermont 2.5V Multi Mini Christmas Replacement Bulbs for Christmas Trees and Incandescent String Lights, Pinched Base, 100 Count (0.42 Watt, 170 mA) - Amazon.com
20x 2.5v Clear White Mini Christmas Tree Light Bulbs With White Base | eBay