BenQ EX800ST User Manual page 98

Time used in SmartEco mode = z hours
Time used in LampSave mode = a hours
2. Equivalent lamp source hour = α hours
α = x(A' / X) + y(A'/Y) + z(A'/Z) + a(A'/A), if
X= lamp life spec of Normal mode
Y= lamp life spec of Economic 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
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 light mode in "Minutes" then rounds down to an integer
in hours shown in OSD.
For time used in each light 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.
To obtain the light hour information:
1. Go to Advanced Menu - Settings > Light Settings and press OK. The Light Settings page
appears.
2. Press to select Light Usage Time and press OK. The Light Usage Time information is
displayed.
You can also get the light hour information on the Information menu.
Extending the lamp life
• Setting the Light Mode
Go to Advanced Menu - Settings > Light Settings > Light Mode and select a suitable light power
from among the provided modes.
Setting the projector in Economic, SmartEco or LampSave mode extends lamp life.
Light mode Description
Normal Provides full lamp brightness
Economic Lowers brightness to extend the lamp life and decreases the fan noise
Adjusts the lamp power automatically depending on the content brightness level while
SmartEco
optimizing display quality
Adjusts the lamp power automatically depending on the content brightness level while
LampSave
offering a longer lamp life
• Setting Auto Power Off
This function allows the projector to turn off automatically if no input signal is detected after a set
period of time to prevent unnecessary waste of lamp life.
To set Auto Power Off, go to Advanced Menu - Settings > Operation Settings > Power
On/Off Settings > Auto Power Off and press
98 Maintenance
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