Features:
1. This one is good because it has 4 LED's in the end. More light is emitted from this bulbs.
2. Equivalent to 50W-70W Halongen light bulb, using only 5Watt.
3. Ceramic base for fast heat dissipation
4. Instant-on to full brightness.
5. No more maintenance, long lifespan.
6. CRI≥80Ra 
Specification:
Base:           BA15D
Part Number:64pcs 2835 SMD
Power:          5W
Voltage:         AC110V~120V
Brighrenss:    400~500lm
Beam Degree: 360 degree
Material:      Ceramics+PC
Bulb Light:   Cool White(5500K-6500K)
Size:           16mm x 53mm

This base can fit the following model:
Singer 15
Singer 99
Singer 201
Singer 306
Singer 221 (featherweight)
           color black
           color beige (tan)
Singer 222K (featherweight free arm)
Singer 301 and 301A (all colors)
Singer 401A,401G
Singer 500 series
Kenmore 158.1760
Kenmore 158.1400
Kenmore 158.1802

Package including:
5pcs LED Light Bulbs