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Light Bulbs:
The Base
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When selecting or replacing a light
bulb it is important to know the correct base otherwise
the bulb won't fit in the fixture socket. The guide
below does not cover every light bulb base available,
only the most common ones found in fixtures in today's
homes. Also, there may be many bulb shapes not shown
that have similar bases.
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Incandescent Light Bulbs
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Medium
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Candelabra
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Bayonnet
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Mogul
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Most common screw base
for household light bulbs. Table and floor lamps, ceiling
fixtures, flood and spot lights
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Smaller screw bases,
regular and mini-candelabra. Common in chandeliers and
some outdoor post lamps.
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This base, with 1 or
2 contacts on the bottom, is inserted in the socket
by pushing and twisting the bulb until it locks.
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Uncommon - might be
found in garage or utility building fixtures requiring
high wattage bulb.
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Halogen Light Bulbs
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Medium
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2-Pin
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Most common base for
halogen household light bulbs. Sometimes used in recessed
ceiling fixtures.
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This is the type of
base found in projector bulbs. Also used in low voltage
track and cable lighting systems.
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Compact Fluorescent (CFL) Light
Bulbs
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Medium
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Pin Base
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Most common base for
CFL household light bulbs. Can be substituted for incandescent
bulbs in table lamps and other fixtures with medium
base sockets.
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There are many pin configurations
for CFLs. Best to talk to the vendor before buying.
Found in some wall sconces and step lights.
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Linear Fluorescent Light Bulbs
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Bi-Pin
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Single Pin
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Need help? We're just a phone call away — 1-866-867-2852.
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Prices subject to change
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