SPRING PARK E27 to B22 LED Light Bulb Screw Lamp Holder Base Socket Adapter Converter - Walmart.com
E-Simpo B22 to E26 E27 Light Socket Adapter, UK AU India Bayonet Lamp Base to Edison Screw E26 E27 Bulb Holder Converter Adapter CE Rohs (4) - - Amazon.com
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uxcell® 2pcs E27 to B22 Extender Adapter Converter Lamp Bulb Socket Holder White - - Amazon.com
B22 to E27 Socket Adapter, Bayonet BC Cap B22 To E27 ES Edison Screw Converter, BC to ES Extend Lamp Holder Base, B22 to E27 Adaptor Holder Fitting 0-250V, 2A Lamp Socket
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All you need to know about the types of LED bulbs - Rediff.com