I just got this projector set up and so far i love it with the exception of one problem. I would like to extend the bulb life, but when I select Eco under Lamp Power there is no change in brightness at all no matter what the source or ambient light is. I cant see to find any information regarding this and I am curious if I have a defective projector. There is however a change in the fan speed when changing between the two modes just not to the output. Any help would be appreciated.