There are some projection lamps that are used more often for stage and studio
lighting. That usually is the case where a high illumination is required
and the design of the lamp makes it possible to incorporate it into fixtures
with good reflector control. High light output and light control, that's why many designers have
incorporated the EHA projector lamps for many kinds of lighting applications.
There's always need for an adequate amount of light to clearly illuminate a
stage or a studio presentation. There are a wide variety stage equipment
use the EHA lamp, and they don't all look at all the same. In fact, some companies who make this
equipment have switched bulbs from
time to time for any number of reasons. The main purpose for a bulb like
this is the light it puts on a stage and to properly deliver the lighted task.
The brightness, as most people call it, needs to be enough to gain contrasts
of various types or achieve good general illumination.
All of the EHA projector lamps regardless of the brand, have the same shape
and filament structure making them identical for all types of projection
equipment. There are quite a few lamps that have the
exact same shape of another lamp which might have a different voltage or wattage,
but almost always the base is different.
That's one of the reasons they're not interchangeable. The EHA
projector lamps are 500 watts and 120 volt and have two post connections that
are not the same size so it can't be put in wrong. In regards to
the shape, many bulbs have the same shape with a linear tube and a filament
array, but that's where the similarity ends. Another thing to remember, because
these have a high light output, that usually means they have a
much shorter life, but the EHA has one of the longer hour ratings than most
others, a 75 hour average rated life. 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 inward reflector of the lamps, wipe it thoroughly with a soft cloth.
Most people who maintain projection equipment are aware of this and take steps
to properly handle the bulb.
Another thing to keep in mind when replacing these is that they are
identified by a 3 letter code on the bulb itself. You'll see it somewhere
on the ceramic base if it's more like a bulb as opposed to a reflector type
lamp. Sometimes you'll see the code as EHA as described here or FXL, DYS, EVD, ELH or
something similar to that, you get the idea. The ANSI 3 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, EHA projector lamps are used specifically for the stage projectors they operate in. Whatever type of projection lamp you have, you
can get what you need while
getting a better quality bulb. We have a large inventory
of projector bulbs for nearly every type of lighting application in the field. If
you need help identifying a stage projection bulb, our customer service
representatives can help you determine what you have.