HQRP 110V LED Light Bulb Cool White for Singer 201/221 / 222/247 / 301/337 / 347/401 / 403/404 Sewing Machine plus HQRP Coaster HQRP&reg; LED Bulb plus HQRP&reg; Coaster; Base: BA15d Double Contact Bayonet Base; Lumen: 300-350; Working Voltage: 110V AC; Power: 3 Watt; LED: 64 LEDs; Lumen Color Temperature: Cool White 6000K-6500K; 200 days warranty!