BenQ MS550 - Lamp Usage and Lifespan Information; Understanding Lamp Hour Calculation and Display

38 Maintenance
Lamp information
Getting to know the lamp hour
When the projector is in operation, the duration (in hours) of lamp usage is automatically calculated by
the built-in timer. The method of calculating the equivalent lamp hour is as follows:
1. Light Usage Time = (x+y+z+a) hours, if:
Time used in Normal mode = x hours
Time used in Eco mode = y hours
Time used in SmartEco mode = z hours
Time used in LampSave mode = a hours
2. Equivalent Lamp Hour = hours
, if
X= lamp life spec of Normal mode
Y= lamp life spec of Eco mode
Z= lamp life spec of SmartEco mode
A= lamp life spec of LampSave mode
A’ is the longest lamp life spec among X, Y, Z, A
To obtain the lamp hour information:
1. Go to Advanced Menu - Settings > Lamp Settings and press OK. The Lamp Settings page
appears.
2. Press to select Lamp Timer and press OK. The Lamp Timer information is displayed.
You can also get the lamp hour information on the Information menu.
For time used in each lamp mode shown in OSD menu:
• Time used is accumulated and rounded down to an integer in hours.
• When time used is less than 1 hour, it shows 0 hours.
When you calculate Equivalent Lamp hour manually, it will probably have deviation from the value shown in OSD
menu since projector system calculates time used for each lamp mode in “Minutes” then rounds down to an integer
in hours shown in OSD.
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