FK Apgaismes tehnika ('Lighting Equipment', also known as ESR Rīga and Enerģija Rīga) was a Soviet Latvian football club from Riga, a four-time winner of the Latvian league.

First appearing in the 1950s, ESR Rīga (named after the Riga Electric Lightbulb Factory, Latvian: Rīgas Elektrospuldžu rūpnīca) made its debut in the Latvian league in 1966 and already in the first season won it.

In the years that followed, Enerģija was always among the top teams in the Latvian league but the next title was won only in 1976.

The Enerģija was coached by Boriss Reinholds who later with good success worked with Zvejnieks Liepāja.

In 1977 Enerģija won its fourth and final title, as the club's forward former Daugava Rīga player Anatoli Kondratenko was the best goalscorer in the Latvian league.