Allied Telesis SwitchBlade x3100 Series Manual page 218

Introduction ECO Functions and Lamp Test
When exiting ECO mode (mode transition from ON to OFF), all applicable LEDs will illuminate in alternating
colors for 3 seconds (also effectively a lamp test), then return to their appropriate normal states (as per tables
above)
Alternating colors means that the LEDs alternate green/amber, with each color showing for 200 milliseconds,
during the 3 second lamp test period. Note that the XE4 port LEDs do not have an amber color, so during
lamp test they appear as solid green for the 3 second lamp test period.
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Software Reference for SwitchBlade x3100 Series Switches (Setting Up the Switch)