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paul russells LED Light Bulbs Edison Screw E27, 40w Bulbs, 5.5W 470LM LED Bulbs, 2700K Warm White Lamps, Frosted C37 ES Candle Energy Saving Light Bulbs Pack of 6 : Amazon.co.uk: Lighting
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LOHAS B22 LED Bulbs 150W Equivalent, 17W LED Bayonet Light, Day White 6000K, Super Bright 1600Lm, Non-Dimmable, Energy Saving Light Bulbs, 4 Pack : Amazon.co.uk: Lighting
Light Bulb Comparison Guide - The Lightbulb Co. UK
Phasing Out of Traditional Incandescent Light Bulbs - The Lightbulb Co. UK
Guide to energy efficient lighting - Energy Saving Trust
Energizer Smart LED Bulb ES/E27 | Lighting - B&M
Ultra efficient | Philips lighting
Dimmable LED Bayonet Light Bulbs, 9W 806LM LED Bulb, 60W Equivalent, Warm White 2700K, B22 Bayonet Cap, Energy Saving Lightbulb Flicker Free, 6 Pack : Amazon.co.uk: Lighting