FK Apgaismes tehnika ('Lighting Equipment', also known as ESR Rëga and Enerãija Rëga) was a Soviet Latvian football club from Riga, a four-time winner of the Latvian league. It went bankrupt together with the factory that supported it in the early 1990s.
First appearing in the 1950s, ESR Rëga (named after the Riga Electric Lightbulb Factory, ) made its debut in the Latvian league in 1966 and already in the first season won it. One of the club's leaders Nikolajs Jermakovs after the season was signed by Soviet first league club Daugava Rëga. Still the club managed by E. Tantiba won the second league title in 1967.
In 1968 the club was renamed as Enerãija Rëga ('Energy'). In the years that followed, Enerãija was always among the top teams in the Latvian league but the next title was won only in 1976. The Enerãija was coached by Boriss Reinholds who later with good success worked with Zvejnieks LiepÃÂja. In 1977 Enerãija won its fourth and final title, as the club's forward former Daugava Rëga player Anatoli Kondratenko was the best goalscorer in the Latvian league. Another former Daugava player Ronalds à ½agars was the club's goalkeeper in 1977.
After 1977 Enerãija failed to win any more league titles but in 1982 it won its first and final Latvian Cup by beating Torpedo Rëga 2:1 in the final match. In 1987 the club was renamed to FK Apgaismes tehnika. The last relatively successful season for the club came in 1990 as it finished fourth in the Latvian league and reached the Latvian Cup final. After the 1991 season the club went bankrupt, some of its players played with Decemviri II in 1. lëga in 1992, but the history of one of the best Riga clubs of the 1970s was finished. In 1992 Decemviri II also became defunct.