NEC NP-P401W User Manual page 114

5. Using On-Screen Menu
Using the Wall Color Correction [WALL COLOR]
This function allows for quick adaptive color correction in applications where the screen material is not white.
NOTE: Selecting [WHITEBOARD] reduces lamp brightness.
Setting Eco Mode [ECO MODE]
The ECO MODE increases lamp life, while lowering power consumption and cutting down on CO emissions.
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Four brightness modes of the lamp can be selected: [OFF], [AUTO ECO], [NORMAL] and [ECO] modes.
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