How do you check the life of a projector lamp?

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Tags

1. #period
2. #screen
3. #model
4. #information
5. #approx
6. #displayed
7. #power
8. #hours
9. #brief
10. #projector
11. #press
12. #current
13. #called
14. #button
15. #older
16. #projectors
17. #which
18. #includes
19. #seconds