Singer 5830C Sewing Machine: Replacing The Light Bulb - YouTube
LED Light Bulbs for Singer Home Sewing Machine 0.5W 220 Volts Push In Type 2PCS | eBay
Singer Featherweight 221 and 222 Light Bulb - LED – The Singer Featherweight Shop
LED B15 Bayonet Base Light Bulb for Singer Sewing Machines 15 66 99 128 221 Featherweight | The Old Singer Shop
Amazon.com: ID: 2PCW. 2 New Generic Clear Push-in Sewing Machine Light Bulbs, 120V-15W, Compatible with, not Manufactured by Singer. Will fit Singer Featherweights 221/222, Plus Many Others.
Singer Sewing Machine LED Screw-In Light Bulb, 1 count - Fred Meyer