====Arc lamp and filter selection====
* Two arc lamps are permanently mounted in the spectrograph - you no longer need to swap out a lamp - but the arc lamp filters are still changed manually. These will be changed for you by the duty technician when you submit your google form requesting your grating/arc lamp/filter setup. Filter requirements are listed in the table above.<!-- On the spectrograph, the CuNe lamp (Lamp 1) is in the horizontal housing, with two slots for filters in the light path. The vertically housed CuAr lamp (Lamp 2) is above it, similarly with slots for two filters at the bottom. Filter requirements are listed in the table above and the filters are stored in a small, labelled wooden box on the bench in the grating room (on the NW side of the dome).-->
* The software now decides, based on which grating is in use, which lamp to switch on once ARC is selected from the ''Exposure type'' drop-down list on the ''Exposure/CCD info'' pane.