Amazon Basics LED E27 Edison Screw Bulb, 4.3W (Equivalent to 40W), Clear Filament, Warm White, Non Dimmable - Pack of 6

With a life of 15,000 hours, the bulb will last over 13 years (based on 3 hours of use each day)
Provides 470 lumens of light immediately, with no waiting time to warm up to full brightness
With a colour temperature of 2700 Kelvin, the bulb provides a warm white light, creating a comfortable atmosphere in any room
Using 4 watts of energy and just £0.61 per year to operate, this bulb saves up to 90% per year and £75.61 over its lifetime compared to its incandescent equivalent (based on 3 hours/day, 0.14 £/kWh; may vary depending on rates and use)
High colour rendering (CRI > 80) provides vivid and natural colour
The clear bulb provides modern LED technology, plus a traditional filament for a charming, nostalgic appearance
Non Dimmable bulb, does not work with dimmer