The EYB lamp has been used for many kinds of projector lamp applications from various manufacturers. It has a common shape that's been the design of many types of higher wattage lamps. The base of EYB projector lamps have two posts or connection points that have a slightly different diameter for each one.
The connector makes it virtually impossible to put them in wrong or to use them in a projector they are not designed for. There are a variety of stage equipment and projectors which use the EYB lamp, and they have a similar task which is to illuminate. The brightness, as most people call it, will need to be adequate for dramatic presentations as well as simple overhead presentation viewing. The EYB lamps are not only used in projection equipment, but also for stage lighting applications as well. One of the reasons they are widely used in studios or stages is that they have a color temperature of 3250K which is desired by most production companies.
All of the EYB projector lamps regardless of the brand, have the same shape. That's one of the reasons they're not interchangeable with other types of projection lamps. The voltages of projection lamps are different and the lumen output changes as well. EYB projector bulbs are used specifically for projectors, stage and studio lighting fixtures. Of course, you will need projectors that will have the correct voltage and socket for these projector bulbs.
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 EYB which has a ceramic base. Another thing to remember is that because these have a high light output they can have a shorter life.
With a rating of 75 hours it's good to turn off the lamp when it's not in use. Another caution is that these EYB bulbs should not be touched with your skin. The skin's natural oils can react with the glass and there will likely be some reaction which will shorten the lamp life.
Another thing to remember when replacing these is that they are identified by a 3 letter code on the ceramic base itself. Sometimes you'll see a code such as EYB as described here or another type with the letters ENX, FXL, DAY, DYS, EVD, EVW or something similar to that. The ANSI 3 letter code identifies that bulb as to the shape, wattage, voltage and any other standard information.
We have three of the best manufacturers for all bulbs types which are Sylvania, Ushio, and Philips. The EYB has been widely used throughout the world and with so many different kinds of different equipment applications we highly reccomend using one of the manufacturers offered by BulbAmerica.