There's never been a time where the lighted projector has been so needed by
schools and educational institutions. The needs of overhead presentation has exploded over the past
three decades
bringing with it the need for a consistent source of lamps. And although
computer presentation has been
popular, there are still millions of regular overhead projectors in use on a daily
basis. The need for easy visual communication makes it something that will
be used for many years to come. There are a wide variety of overhead projector
lamps that are used in projection equipment, and they don't all use the
same bulb. In fact, some companies who make these have switched bulbs in
their design from
time to time for any number of reasons. The main purpose for a bulb like
this is the light it puts on a screen, how well it fills out the screen space.
The brightness, as most people call it, needs to be enough to gain good contrasts
of writing or overhead transparencies. Of course, having a bulb that is
working is important as well because they seem to go out when you least expect
it!
Many of the overhead projector lamps have a similar shape, and sometimes the
exact same shape of another which might have a different voltage or wattage.
That's one of the reasons they're not interchangeable. Almost always, the
voltages vary and the amount of light as well. In regards to
the shape, many bulbs have the same shape as
MR16 halogen bulbs, but that's where the similarity ends. The MR16 has a
few basic voltages and does not have the watts that are needed to produce the
light that an overhead projector needs. Another thing to remember, because
overhead projector lamps have a very high light output, that usually means they have a
much shorter life, it's just the way it is with the physics of incandescent
lighting. Since the life is shorter, it's good to turn off the lamp
when it's not being used. Every minute of time you save means the lamp will
last longer and you'll be saving money. These bulbs should not be touched with your skin as the oils can
react with the glass. If they
are touched, the life span of the bulb will be greatly reduced and sometimes you
might see a bubbling of the glass. In case you ever
do touch a projector light bulb, wipe it thoroughly with a soft cloth.
Another thing to keep in mind when replacing these is that they are
identified by a three letter code on the bulb itself. You'll see it somewhere
on the back or the top if it's more like a bulb as opposed to a reflector type
lamp. Sometimes you'll see the code as ENX or FXL, DYS, EVD, ELH or
something similar. The ANSI three letter code identifies that bulb as to the
shape, wattage, voltage and any other standard information. Unlike other
types of bulbs, these have some standards across various manufacturers, the only
thing that varies is quality. We have two of the best manufacturers of all
types which are Sylvania and Eiko.
In summary, overhead projector lamps are available in a variety of sizes,
and are used specifically for the projection equipment they operate in. Of course, you will need
projectors that will have the correct circuitry
for the projector bulbs. Whatever type of projector lamp you have, you will be
the longest life bulb possible while
getting the most light you can for your money. We have a large inventory
of overhead projector lamps for nearly every type of lighting presentation application in the field. If
you need help identifying a bulb, our customer service
representatives can help you determine what you have.
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