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No brainer%3F Cost of CFL v tungsten filament bulb
Ìý100W18W CFL stick
Cost£0.50£1.99
Lamp life (hours ) 10008000
Total lamp cost (over life of one CFL )£4.00£1.99
Total electricity cost* (over life of one CFL)£63.20£11.38
Total costs£67.20£13.38
Savings through the use of CFL instead of 100 W GLS%3Cbr /%3EÌý£53.82
*Based on an electricity price of 7.9 p/kWh %3Cbr /%3E %3Cbr /%3ESource: Energy Saving Trust - www.est.org.uk