Hi dear, Happy new year.
Sorry for the delayed reply. H2 optical engine has 30000-hour using life, would suggest you to use it about 8 hours a day, but it depends on your using habit.
For the precautions, please don't block the wind outlet while using it, projector needs a good environment to cool down the system. You can find more tips at the warranty card, please check. Thanks again for your support. Let me know if you need any help.