About the quality, you do not have to be worried as these bulbs are very Long Lasting so you have to change the bulbs less often. Available Cap Type:Bayonet Cap - BC/B22, Edison Screw - ES/E27, Small Edison Screw - SES/E14.

BULB TYPE: T45-4W=40W-E27-AMBER(2200K)
PACK SIZE: 6 BULBS
Brand: paul russells
Type: LED BULBS
Beam Angle: 300 - 360 Degrees
Bulb Life Hours: 15,000 Hours
Bulb Shape: GLS, Golf, Candle, ST64, T45, G80
Bulb Wattage: 2W, 2.5W, 4W, 6W, 6.5W
Colour: Extra Warm White
Colour Temperature: Extra Warm: 2200K
Connectors: 2 Pin, Screw
Country/Region of Manufacture: China
Custom Bundle: No
EC Range: A+ - G
Energy Efficiency Rating: A+
Features: Non-Dimmable, Energy Savings, Filament
Finish: Amber
Indoor/Outdoor: Indoor
Labels & Certifications: CE, RoHS, UKCA
Light Colour: Extra Warm White / Amber
Lighting Technology: LED
Lumens: 180 lm - 650 lm
Manufacturer Warranty: 1 Year
Material: Glass
Number of Bulbs: 1 - 10 Bulbs
Output Voltage: 240 V
Style: Vintage/Retro
Switching Cycle: 7500
Voltage: 240 V
Sockets: BC/B22, ES/E27, SES/E14