[1] Ruoho has lived most of his life in Helsinki, Finland, but has also, since 2000, travelled to Regina, Saskatchewan, Canada for six months in 2000–2001,[2] and also spent time in Dublin, Ireland.

[6] Lackluster was formerly known as the chiptune musician, Distance, part of the demoscene groups Orange, Monotonik, Calodox, The Digital Artists, The Planet of Leather Moomins (TPOLM), FLO and Satori.

[7] Esa also ran a Bulletin Board System, Cloudcity, from 1992 to 2000 – utilizing HectoBBS (1992), SuperBBS (1992–1994) and PCBoard (1994–2000) BBS Software.

Since 2000, Ruoho has played numerous musical performances as Lackluster, Esa Ruoho and as a part of the ambient-drone duo HLER in Finland, Sweden, Norway, Netherlands, Belgium, Italy, Germany, France, Spain, Ireland, England, Austria, Poland, Russia, Latvia, Estonia, Bulgaria, Hungary, Lithuania and Ukraine.

[6][9] Ruoho has also played as warm-up support for numerous electronic musicians, such as Biosphere, Petri Kuljuntausta, The Orb, Mixmaster Morris, Brothomstates, Aleksi Perälä/Astrobotnia/Ovuca, Cylob, Wevie Stonder, Machinedrum, Jimmy Edgar, Move D, Jimi Tenor and Bad Loop.