The E27 Edison Screw cap is one of the most common light bulb caps available today. Named after the inventor Thomas Edison, it is an extremely versatile cap, used in a range of domestic and commercial fittings. Variants of the cap include the E14 Small Edison Screw (SES) and E10 Miniature Edison Screw (MES). There are a wide range of light bulbs available with this type of fitting.
As its name suggests, LED light bulbs with ES caps are simply screwed into the fitting, making them easy to replace. When fitting new ES bulbs, be careful not to over-screw them or apply too much force, as this could cause them to break or malfunction.