BROWNOUT
blackout, brownout, dimout
(noun) darkness resulting from the extinction of lights (as in a city invisible to enemy aircraft)
Source: WordNet® 3.1
Etymology
Noun
brownout (plural brownouts)
A period of low alternating current line voltage, causing a reduction in illumination
Temporary dimming of vision, usually with a brown hue and accompanied by loss of peripheral vision or tunnel vision.
Temporary closing of a fire station, usually due to budget restrictions.
A power outage during the day; distinguished from a blackout, which occurs at night
(Philippines) A blackout, regardless of time of day.
Usage notes
• A rolling brownout describes a deliberate reduction in voltage (for sense 1) or of firefighting (for sense 3) in multiple service areas at staggered times.
Synonyms
• grayout, greyout
Coordinate terms
• blackout
Source: Wiktionary