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Light up your life with a new exhibition by Argentinian artist Jorge Orta, which opens at the Alma Gallery in London this week. Following giant luminographic displays in Peru and on an active volcano in Japan, as well as in his native country, Orta has brought some of his creations - which employ a whole alphabet of symbols - to the capital. Work on show includes his Steel Disk/Laser Cut Signs/ Blue Neon (right).

Alma Gallery, 28 Cork Street, London W1 (0171-589 4797) 7 to 19 Sept