It's an older style light bulb that still has many places where it continues to be used today. For many different brands of machines, projectors and viewing equipment, the one that has been used are the DNE projector lamps.  These are made with a special shape which has an integral reflector and an two post base.  Because visual communication is important it will still be available for all those older projectors for the coming years.  There are a wide variety equipment and projectors which use the DNE lamp, and they have a similar task which is to illuminate.  The main purpose of any projector bulb 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 objects, writing or overhead transparencies. 

All of the DNE projector lamps regardless of the brand, have the same shape, and sometimes the exact same shape of another lamp which might have a different voltage or wattage.  That's one of the reasons they're not interchangeable.  Almost always, the voltages of projection lamps are different and the lumen output as well.  These projector lamps are 150 watts and 120 volt.  In regards to the shape, the DNE is very unique.  This lamp is very specific for the application it's used in, so don't go looking for a replacement of some other type, simply replace it with another DNE.  The life is shorter, the rating is only 15 hours, so it's good to turn off the lamp when it's not in use.  Some people have thought that you can change out the bulb inside the reflector, but you can't, it is precision fitted for the maximum light pattern that is possible.

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 back or the top if it's more like a bulb as opposed to a reflector type lamp.  Sometimes you'll see a code such as DNE as described here or another type with the letters ENX, FXL, DAY, DYS, EVD, ELH or something similar to that.  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, DNE lamps are used in stage and studio, overhead or slide projector equipment they are made to operate in.  Of course, you will need projectors that will have the correct voltage and socket for the projector bulbs.  Whatever type of projection lamp you have, you can get what you need from Service Lighting.  We have a large inventory of projector bulbs for nearly every type of lighting application in the field.  If you need help identifying a projector bulb, our customer service representatives can help you determine what you have.