Epson 109W - Traditional Mercury Lamp
The Epson 4000 lumen projector uses the same types of lamps that have been used over the last decade. It makes the initial cost of the projector less expensive but requires replacing over time. These lamps have the shortest life span and lose brightness faster than laser or hybrid technology. To replace the lamp in the Epson projector, there is a 9 step process and may require a ladder to reach the projector. School districts also need to consider when to purchase replacement lamps (and how to store them), since they can be stolen and easily re-sold. Also, since these lamps contain mercury, they may need special handling for disposal, especially if broken.
Casio XJ-S400W - LED / Laser Hybrid
The Casio 4000 lumen projector uses a proprietary hybrid light source that combines both laser and LED light sources. This technology has the advantage of eliminates the risk of mercury used in a traditional lamp and does not need to be replaced. These light sources are less expensive than a 100% laser solution but this design has usage limitations that schools should keep in mind. While the hybrid light is rated to 20,000 hours, if there is extended use more than 5 days per week and ten hours per day, the light source is only warranted for 6000 hours.
BenQ LW720 - 100% Laser Light
The BenQ 4000 lumen projector uses a 100% laser light source engine, which is ideal for higher brightness projectors. According to Futuresource, nearly 85% of solid-state light projectors from over 25 different brands worldwide used this design in 2019 for projectors generating between 3500 and 6000 lumens. The BenQ projector is rated to 20,000 hours with no usage limitations, enabling the projector to stay brighter over a longer period of time compared to a traditional lamp.