J Hofert Mini Green 2.5V Replacement Light Bulb (5-Pack) - Orme Do it Best Hardware
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
Sale~ 100 Clear Replacement Mini Glass Bulbs - Incandescent 2.5 Volt 0.1amp, .25w ES Heavy Duty - White Base -for pre-lit Trees & 200+ Strings (NOT Standard 2.5volt Bulbs!! *Read Full Description!) - Amazon.com
612 Vermont 2.5V Multi Mini Christmas Replacement Bulbs for Christmas Trees and Incandescent String Lights, Pinched Base, 100 Count (0.50 Watt, 200 mA) - Walmart.com
Basic Series 2.5 Volt Push-in Replacement Bulbs Clear Set of 5 - Etsy
Christmas Replacement Bulbs for String, Icicle, Net Lights – 2.5-Volt – Tupkee