In 1993 the St Mungo Museum of Religious Art was opened to the public. The architects, Page and Park of Glasgow created a 5 storey stone museum in period style to fit in to the Cathedral precinct. This unique museum explores the importance of religion in people's lives across the world and across time. It stands on the site of the medieval Bishop's Castle. The main gallery of the museum is a double height space which features full height stained glass window exhibits on the two side walls, east and west facing. Natural and artificial light is subtly controlled by passive means to unsure that the illumination on the watercolour painting and textile floor covering in the foreground does not exceed 50 lux. Although natural light is heavily controlled the daylit feel of the space is maintained by concealed fluorescent uplighting in troughs on the west side and concealed fluorescent wall washing on the east side of the gallery. The troughs contained custom designed reflectors to ensure a very even light distribution to complement the natural light. The Low Light Gallery situated off the Main Gallery features a number of Albrecht Dürer engravings and other very light sensitive exhibits illuminated to 50 lux. It also houses a simple recreation of a temple setting for the dancing Shiva statue. The flickering light from the flames of open oil lamps was recreated with custom flicker effects designed and built by Kevan Shaw and Malcolm Innes. These were recessed into the ceiling in front of the statue to make the shadow of the statue dance and jump across the back wall of the gallery. In front of the Shiva statue is a stained glass exhibit. The ceiling in the gallery opens out into a gothic vault to frame this window. The dramatic lighting of the vault is achieved with a row of very narrow-beamed low voltage reflector lamps concealed in troughs on either side of the vault. A special transformer system with in-built dimming and voltage sensing was used to prevent noticeable voltage drop along the line of lamps and also to prevent cascade failure of lamps.