The choice of projectors will depend on the kind of business that you have. If you are in the advertising business for example, you will have to invest heavily on a good projector since you will be using it regularly for client presentations. The specifications of the projector that you will have to buy will also depend on the size of your conference or presentation room.
There are projectors that are designed to function well in small office room but it will not do when the presentation will be made in a larger area. Presentations for larger areas and for a great number of people should be made through more sophisticated projectors.
People who usually travel from one place to another for their business presentations should invest in a good quality portable projector that is easily transported and provides an easy set up. A projector that can be set up in a snap will do because you do not want to carry an army of technical people when doing your mobile presentations. A projector that easily connects with a personal or portable computer will be ideal to make your presentations simple but sophisticated.
A portable projector with a minimum brightness capacity of at least 800 lumens is acceptable. However, larger projectors must have a brightness capacity of at least two thousand lumens to make the presentation clear even to those who are seated at the back of the room. A projector must have at least a minimum of 1500 lumens to be able to project effectively in a room where plenty of light comes in as when there are no blinds or curtains.

It is best to use projectors in a dark room but if it cannot be avoided, always position the projector at an area where there is less light. It is also important to take note of the resolution of your projector as this signifies the amount of pixels it can display.
Projectors can be easily installed but it is best to consult technical people for setting up the projector especially if they will be mounted to the ceiling. Make sure your projector’s efficiency will last long by using alcohol or a special cleaning solution for the projector lens.