E10 Miniature Lamps or Light Bulbs, 2.5V 0.3A, Pack of 10
E-outstanding 10pcs E10 Mini Light Bulbs Experiment Screw Base Indicator Light Incandescent Bulb, 2.5V 0.3A - Amazon.com
Christmas Replacement Mini Light Bulbs Incandescent Light Bulbs 2.5 V Mini Glass Lights with Green Base, 0.17 Ampere, 0.425 Watt (Clear, 50) - Amazon.com
GSC International 120017 Mini Lamp Bulbs, 2.5V, Pack of 10 – GSC Go Science Crazy
10pcs E10 1.5V 2.5V 3.8V 4.8V 6V 6.2V little Bulb for Test Experiment Teaching Flashlight | Lazada PH
E5 Screw Miniature Small Signal Light Bulb 1.5V 2.5V 6.3V 12V 24V 0.1A 5mmx16mm | eBay
Miniature Screw Base Light Bulbs, 2.5V, Pack of 10 - Arbor Scientific