I believe that phosco p222s are rare post-top lanterns, and they are basically the larger version of the P178/ P179. The canopy is made of aluminium, and the bowl is made of Acrylic. These lanterns can run 3 90w SOX lamps, 3 MBF lamps or 3 SON lamps.

Easthampstead House, Bracknell

These phosco p222s are in Bracknell, and they used to run on MBF lamps, but now they run on SON lamps. There used to be 4, but 2 of them have been replaced with a double-armed bracket, and 2 Philips iridiums.

Here is the replacement Philips iridiums.