HAMMERTON LIGHTING RESOURCE SERIES
LAMPING RESOURCE GUIDE
BASES
COMMON BASES USED BY HAMMERTON
Thomas Edison developed a system of screw mounts for light bulbs that are still used
today for most incandescent light bulbs like the medium and candelabra base bulbs that
are designed into most Hammerton fixtures. Hammerton also sells fixtures that use
halogen bulbs that require a bi-pin base as well fluorescent bulbs that require a twist lock
base. By standizing around these commonly used bases, we maximize the consumer’s
bulb choices and minimize the cost of upgrading as new technology becomes available.
Medium E26
Candelabra E12
Twist Lock GU10
10 mm
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Twist Lock GU24
24 mm
INCANDESCENT BULBS
HAMMERTON LIGHTING RESOURCE SERIES
LAMPING RESOURCE GUIDE
INCANDESCENT BULBS
INCANDESCENT BULBS USABLE IN HAMMERTON FIXTURES
Medium E26
Candelabra E12
A-19 Standard Light Bulb
A-15 Standard Light Bulb
Torpedo - Type B
Bent Tip - Type CA
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Torpedo - Type B
Bent Tip - Type CA
T10 - Tubular
T-8 Tubular
T8 - Tubular
T6 - Tubular
Incandescent light bulbs come in a range
of shapes and sizes. The letters represent
the shape of the bulb, and the numbers
represent the maximum diameter of the
bulb in 1⁄8 of an inch increments. As an
example, the "standard" light bulb in the
United States is an A-19. The "A"
designates the shape and the number 19
stands for 19/8 or 2 3/8 inches in diameter.
The 2007 IESA requires the gradual
phase-out of the standard light bulb.
However, more efficient bulbs are
becoming available that meet the more
stringent lumen per watt guidelines
established by Congress.
Additionally, the phase-out does not apply
to commercial grade “rough-service”
bulbs. While rough-service bulbs look
identical to standard light bulbs, the
important differences are on the inside.
These bulbs have additional filament
supports, so they can take wear and tear
due to vibration, rough handling, or
variable line voltage. Most 130 volt light
bulbs are rough-service and will continue
to be available.
Our experience is that many incandescent
bulbs sold under mass market brands in
big box stores have decreased in quality.
Luckily, a wide variety of online sources
sell 130 volt or rough service bulbs that
last substantally longer.
FLUORESCENT BULBS
HAMMERTON LIGHTING RESOURCE SERIES
LAMPING RESOURCE GUIDE
FLUORESCENT BULBS
FLUORESCENT BULBS USABLE IN HAMMERTON FIXTURES
Medium
E26
Candelabra
E12
Twist Lock
GU10
Twist Lock
GU24
10 mm
Spiral Compact
Fluorescent
Spiral Compact
Fluorescent
Compact
Fluorescent
24 mm
Compact
Fluorescent
A-Shape Compact Fluorescent
Dimable Bent-tip Fluorescent
Torpedeo Compact Fluorescent
Torpedeo Compact Fluorescent
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CFL, or compact fluorescent bulbs, are
the best energy-efficient replacement on
the market for standard incandescent
light bulbs. For example, a 13 watt
compact fluorescent light bulb can
replace a 60 watt incandescent and will
save as much as $47 in energy costs
over its lifetime. A 23 watt CFL light bulb
will replace 100 watt incandescent light
bulbs and save $77 over its lifetime.
The light quality of CFL's has improved
dramatically in recent years, and CFL’s
are available in color options ranging
from 2700 Kelvin (replicating the soft
light of incandescent light bulbs) all the
way to 5000 Kelvin (a pure white light
great for tasks requiring high visual
acuity).
Most CFL's will suffer shorter lifespans in
cold locations, or in places where they
will be frequently switched on and off.
Also remember that the majority of CFL
bulbs are not dimmable.
HALOGEN BULBS
HAMMERTON LIGHTING RESOURCE SERIES
LAMPING RESOURCE GUIDE
HALOGEN & XENON BULBS
HALOGEN AND XENON BULBS USABLE IN HAMMERTON FIXTURES
Medium
E26
Candelabra
E12
Twist Lock
GU10
10 mm
MR16 Halogen
Bulb
JD Type Xenon
JDR Type
Halogen
24 mm
JDR Type
Halogen
Both halogen and xenon bulbs are
excellent alternatives to incandescents.
They both emit a whiter and more direct
light, so they are ideal for both task and
accent lighting. Unlike CFL bulbs, they
can withstand frequent switching
without decreasing lifespan.
Halogen bulbs are longer lasting and
more energy efficient than incandescent
bulbs, yielding as much as a 40% savings
over the bulb life. The primary problem
with halogen bulbs is that they are
extremely hot, so they should not be
used within hand's reach in children’s
rooms or play areas. They are also not
ideal for older homes with tempermental
wiring, as variable voltage will cause
them to wear out more quickly than
incandescents.
Importantly, touching halogen bulbs with
bare hands drastically reduces the bulb
life because oil left by the fingers causes
the bulb to heat unevenly and stresses
the bulb surface. Always handle halogen
bulbs with gloves or a soft cloth.
Xenon bulbs are excellent alternatives to
halogen for most applications, and
almost all halogen bulbs can be replaced
with xenon bulbs. Xenon bulbs last up to
20,000 hours, or 10 times longer than
halogen bulbs. They're easier to install
than halogen bulbs because they can be
handled with bare hands, and they also
tolerate unstable voltage much better.
Finally, unlike halogen bulbs, xenon bulbs
do not emit UV rays, so they're ideal
around artwork and sensitive fabrics.
B15 - Halogen
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MR16 Halogen
Bulb
Twist Lock
GU24
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LED BULBS
HAMMERTON LIGHTING RESOURCE SERIES
LAMPING RESOURCE GUIDE
LED
LED BULBS USABLE IN HAMMERTON FIXTURES
Medium
E26
Candelabra
E12
Twist Lock
GU10
10 mm
Medium
E26
Candelabra
E12
Torpedo &
Flame Tip
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Twist Lock
GU10
Twist Lock
GU24
24 mm
Twist Lock
GU24
LED's have a very long life span, and are
the most cost efficient bulbs on the
market when amortized over the bulb
life. They last twice as long as
fluorescents and twenty times longer
than incandescent bulbs. For this reason,
LED's are an excellent choice for fixtures
that are hard to reach and/or require
significant labor to change out bulbs.
LEDs are also capable of emitting light
of an intended color without the use of
filters, and they give off less heat than
incandescent light bulbs with similar
light output.