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11W (=60W) Energy Saving CFL Light Bulbs, B22 B22d BC Bayonet Cap, Stick, 10 Years by Lowenergie [Energy Class A] (3) : Amazon.co.uk: Lighting
Energy Saving Spiral Compact Fluorescent Light Bulb 35W B22 Bayonet T4 Technology Warm White 175w Equivalent : Amazon.co.uk: Lighting