Difference between revisions of "Common Residential Light Bulb Socket Types in North America"
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Revision as of 22:03, 16 December 2014
E26 Edison Screw
In the designation 'Exx', 'E' stands for 'Edison' and 'xx' refers to the diameter in millimeters as measured across the peaks of the thread on the base. In Europe the designation is E27 which is nearly the exact same size.
GU24
The GU24 socket and base system is designed to replace the Edison socket and base in energy efficient lighting fixtures. The California Energy Commission prohibits adapters that would allow the use of screw-in bulbs on a GU24 base. This is to prevent people from using normal incandescent bulbs.
The GU24 base has two dual-diameter pins. The smaller portion has a diameter of 3.4mm (0.13") and the larger portion has a diameter of 5mm (0.2").
A19 bulb with GU24 base
As explained in Common Residential Light Bulb Socket Types in North America the shape of the bulb as described as A19 represents the common shape that most people are familiar with. The A19 bulb was traditionally available with the E26 Edison Screw base. Now as a result of new Government regulations, it is common to see the A19 bulb with the GU24 socket base system.