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The Washington Metropolitan Area Transit Authority (WMATA) is installing red platform warning lights at 14 Metrorail stations to better alert riders about arriving trains. Lights also will be installed at 12 more stations next year.

“These red warning lights are a proven reminder to our customers to stand back from the platform edge when a train is approaching the station,” said WMATA Chief Safety Officer James Dougherty in a prepared statement.

Each lamp contains 34 LED bulbs, consumes about 10 watts of power and is estimated to last 10 to 12 years. The bulb lights steadily at 50 percent power and flashes at 100 percent power when a train approaches or is at a station.

WMATA anticipates saving about $100,000 per year in energy usage by employing the LED warning lights.