The Philips SGS204 is the larger version of the philips SGS203. They could have lamps from 250w to 400w SON. They have a Aluminium base and a GRP canopy and They could have a polycarbonate bowl or they could have flat-glass.

M25

These Philips SGS204s are on the M25. They run on a 400w SON lamp and most of them are group-controlled, but some of them have a photocell.