Philips 'Residium' FGS 224
Lantern acquired in September 2005.
This and a couple of other Residiums were replaced with 100 W WRTL Arcs to improve light levels. This particular lantern was only a couple of years old when removed, and so it is still in good condition. Both the FGS 224 and the slightly larger 225 are used in Derby, but only where complete replacement schemes have taken place.
The Residium looks to have been modelled on both the MA and Streetfighter series. Post top mounting was used for this example, however side entry versions are also available.
The incoming cables terminate in the back section of the lantern, meaning that there is no need to open the bowl if the lamp has already been fitted when installing the lantern.
Removing the back panel reveals the main connections.
The bowl is completely clear, and so optic control is solely provided by the reflectors above the lamp. The lamp support also acts as a 'heat cap' - allowing the tube to achieve a higher relative luminous flux at lower temperatures.
The lamp is powered by an electronic ballast, mounted on a gear tray that can be disconnected and removed from the lantern to speed up replacement if the gear failed.
The Residium was powered up on Thursday, 13th October 2005.
The gear for the Z5670 can be seen in the background.
Lantern operation video:
Philips SGS 306 | Philips FGS 104
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