How to know you should replace your projector lamps?

The following are some tips for you:
1. Projection screen brightness is low, but still can’t adjust through the menu or button , then you should change your lamps.
2. LAMP or COVER indicator light keeps light or projector screen prompts "Please replace the lamp".
3. The lamp life is usually around 2000 hours, after using a period of time, the brightness will decreased significantly, also will deteriorate the quality of the projected image, the image becomes unclear, and color performance is also not great as before.
4. Sudden power off, you may hear a "popping" sound which generate from the break of bulb; restart the projector, if the projector lens is light; then to check whether the bulb is fried or not.