Status LED SBC Candle Pearl Bulb 5.5 Watt (Equivalent to 40 Watt) 470 Lumen SBC (Small Bayonet Cap) Saves over 85% Energy compared to Heavy Duty Lamps 6 hrs per day use will last 11 years Bulb Cost per year = £1.12 based on £0.14 price per KW/h