Sewing Machine Light Bulb (Screw-In, 7/16" Base, 120 Volt 15 Watt). Available in LED and regular.
Fits:
Juki :MCS-1500, HZL-E61, HZL-E70, HZL-E71,MO103, MO134, MO-623, MO-104D, MO-634D, MO-644D, MO-654DE, MO-655