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3Pack TCP 70W = 91W GLS BC B22 Bayonet Cap ECO Halogen A55 Energy Saving Dimmable Light Bulb 220-240v : Amazon.co.uk: Lighting
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Torkase MR16 GU5.3 LED Light Bulbs, 5W 12V Super Bright Cool White Led Spotlight Bulbs with 120 Degrees 6000K, Extra Energy Efficient 50W Equivalent Halogen Bulbs, Non-Dimmable 6 Pack : Amazon.co.uk: Lighting
Incandescent vs CFL vs LED vs Halogen Light Bulbs - Elesi Blog
Guide to energy efficient lighting - Energy Saving Trust
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