What is a Projector Lamp?
The technical description of a projector lamp is that it is an
ultra-high pressure mercury vapor ARC lamp. Projector lamps
are scientifically categorized as metal halide lamps andPhilips has
trademarked the name "UHP lamp" for their
How Does a Projector Lamp Work?
A projector lamp operates by sending an electrical current accross
an ARC gap that is full of
ultra-high pressurized mercury vapor. The electricity lights the
mercury vapor which then causes
the lamp to emit a light with an extreme intensity or brightness.
The bright light created by this process shines onto an
LCD (Liquid Crystal Diplay) or DLP panel which then in turn produces
the fantastic images projectors are known for.
Projector lamps are a extremely complex technology that are very
costly to manufacturer, therefore the price of
projector lamps tends to be pretty high.
Replacing a Projector Lamp
Projector lamps are easy to replace whether you have the bare
projector lamp only or the projector lamp in the black
How Do I Know When My Projector Lamp is Dead?
Often times projectors will have a built in timer that keep tracks
of how long your projector lamp has been running inside
your projector. Once the timer reaches a certain point, usually a
few hours before the expected lamp life, a message will
display on your projector screen. The warning message is usually a
good indicator that you should jump online and start
looking for new projector lamp.
It is possible to get rid of the warning message, you can do this by
searching your projector's manual or navigating through
the onscreen menu if your lamp is still functioning.
Sometimes projectors will shut the projector lamp down when the
timer reaches a certain point, even if it has not been totally
exhausted. In these cases, it is useful to reset your lamp hour
counter as it may increase the amount of life you get from your
We recommend that if you are using your projector lamp for important
presentations, weekly events or even home theater that
it is smart to have a back-up projector lamp in stock so that you
will not miss a minute without your projector.
Projector Lamp Compatibility
Can I Put Any Lamp in My Projector?
Projector lamps are manufactured to specific settings, meaning the
mercury vapor is pressurized to a precise measurement and
the quartz ARC tube is engineered to withstand that pressure.
This means that the projector lamp manufactured for any specfic
projector or group or projectors is unique to those units only. You
cannot, for example, put a 150W projector lamp inside a projector
that requires a 250W projector lamp. It is also impossible to put
a 250W projector lamp inside a projector that requires a 250W
projector lamp but nonetheless requires a different ignition and
Projector lamps also have different ANSI lumens rates or
brightnesses. If you install a lamp with the same ignition and
voltages AND the same wattage settings but a different ANSI lumens
rate then the projector will not perform as it is supposed to.
Are Any Projector Lamps Compatible with Multiple Projectors?
Yes! There are several projector manufacturers who frequently team
up and license the same, exact projector lamp from a single
projector lamp manufacturer.
If you are having problems finding the correct projector lamp for
your projector you can call us directly at 0086-21-51876030.
Extending Projector Lamp Life
Projector lamps usually expire early because they are burning at too
hot a temperature over the course of their lives. Below
are some simple tips for extending your projector lamp life.
The single most important thing you can do to make sure your
projector lamp lasts a long time is to mount your projector in
a space with ample ventilation. Projectors that are mounted in
corners, extremely close to the ceiling or in rooms with little to
no air flow often cause the projector lamps inside them to expire
Vacuum and Blow Compressed Air -
Dust that gathers inside your projector can cause the projector lamp
to burn at too hot a temperature over time which will cut
its life short. The easiest solution to this problem is to vacuum
your projector and blow it out with compressed air every now
and then. Use your judgment, if you are using the projector often,
complete this process more frequently.
Change or Clean Your Filter Regularly -
Almost every projector these days has a filter that prevents dust
from getting inside the sensitive circuitry. The drawback to this
is that if the filter gets clogged with dust it can cause the
projector lamp to burn at a hotter temperature and diminish its lamp
life. The filter on your projector is usually found behind a small
rectangular panel that measures 0.5" by 6" long.
Do Not Turn Your Projector On and Off Quickly -
Turning your projector on and off quickly can have devastating
effects for your projector lamp. Projector lamps typically take
about a minute before they are running in a stable current.
Projectors have special ballasts inside them that ignite projector
lamps at a high voltage and then run them at a low voltage. If you
turn your projector on and off quickly it can cause the
ultra-high pressurized mercury vapor to become destabilized, which
will in turn cause your projector lamp to fail permanently.
Run Your Projector in Economy Mode -
Most projectors these days have normal mode and economy mode.
Economy mode usually makes the projector lamp emit a
slightly lower brightness level and therefore can extend your
projector lamp's life. If you are unsure if your proejctor has
mode, please reference your projector's manual or contact the
Testing a Projector Lamp
Projector lamps are a complex and different technology than most
household or traditional electronics and therefore it is important
know certain facts when attempting to test a projector lamp.
1. Projector lamps use customized ballasts that ignite the lamp by
charging it with a higher voltage in the ignition phase and then
dropping down to a lower running voltage once the circuit is
2. Projector lamps CANNOT be tested with an AMP or OHM meter.
Projector lamps function by igniting ultra-high pressurized
mercury vapor accross an ARC tube. At the point where the mercury
vapor resides there is no conductive electrical material and
therefore testing a projector lamp with an AMP or OHM will not work.
Projector Lamp Anatomy
A projector lamp is made up of several components including the ARC
tube, ultra-high pressurized mercury vapor, electrical
wiring, a quartz globe or reflector, a fastener, a spoke, a bolt, a
screw and finally the black plastic housing itself.
ARC Tube -The ARC tube is a piece of blown quartz measuring about 2
inches in length that protrudes up from the base of
the quartz globe. The ARC tube is positioned by highly-accurate
machines and then set with extra strength plaster.
Mercury Vapor -The mercury vapor inside most projector lamp ARC
tubes is ultra-high pressurized. The mercury vapor is
sensitive to the amount of current running through it and so
projectors have electrical
ballasts inside them to regulate electricity flow. The ballasts
ignite the mercury vapor at a high voltage and then bring the
level down to the apropriate running voltage required to sustain the
Electrical Wiring - The electrical wiring on a projector lamp is
fused inside the quartz ARC tube and runs out the top of the
tube through the side of the reflector. Electricity from the
projector and regulated by the ballast runs in a circuit from the
the projector lamp through the side and back into the projector.
Quartz Globe - The quartz globe or reflector as it is sometimes
called, is the hard exterior skeleton of a projector lamp. The
quartz globe is usually
lined with a highly reflective metal material on the inside that
reflects light generated by the ignition of the mercury vapor inside
the ARC tube. The quartz globe also holds the ARC tube in place and
is usually filled with extra strength caulking in its base to
complete this task.
Fasteners, spoke, bolt and screw -Projector lamps are connected to
wiring that runs current to and from the projector. The
wiring is attached to the projector lamp by way of a fastener, a
spoke, a bolt and a screw.
The fastener is a small metal piece that is either glued, sodered or
clamped onto the side of the projector lamp. The fastener
receives the screw that in turn holds one of the wires in place
against the fastener .
A spoke is connected to the ARC tube and is usually cemented in
place at the back of the lamp. The spoke usually protudes
about an inch and a half and receives the bolt which holds the
second wire in place, enabling the projector lamp to complete
Plastic Housing - The plastic housing is the piece of molded plastic
that holds the projector lamp in place when it is sitting
inside the projector.
Projector lamps are usually locked into the plastic housing using a
retaining clip. The attached wiring easily screws into a slot
at the back of the plastic housing.