Philips 'Iridium' SGS 252

Lantern acquired in June 2006.

From the tried-and-tested mercury lamp to a sign of things to come now - the Philips CPO (Cosmopolis) lamp range - only launched towards the end of 2005. The 'W' suffix means that this lamp gives out white light - another lamp is produced which gives a more golden output (similar to a SON). This is now what the standard side-road light source will be in Derby following the commencement of the 25-year PFI programme in June 2006 - with the Iridium being the luminaire which will contain these revolutionary new lamps (not the Arc or Syracuse as first thought.) - strangely enough, I spotted several examples on the date that this lantern entered the collection!  Some main roads will also use the Cosmo lamp; but it will be of a higher wattage - believed to be 140 W.

The new Iridiums all have deep polycarbonate bowls - perhaps due to vandalism problems with the glass ones used on other Iridiums. Another difference is that these have two grub screws - the single screw employed on previous versions of the Iridium was very problematic; especially on thinner bracket diameters.

The 252 is slightly smaller than the 253; though the lantern remains the same shape. The NEMA socket still has its Zodion dust sticker attached!

It isn't immediately noticeable that the CPO-TW lamp is fitted - but have a look at the lamp cap - this gives it away. Although not visible here, the bowl has one or two scratches on it - this might have been done when the lantern was removed from its original box.

The lamp uses a cap similar to mains-voltage (GU 10) halogen lamps.

As before, the gear is hidden behind a hinged cover.

The gear consists a one-part electronic unit specifically designed for this type of lamp.


The Iridium was fitted to an AC Ford AC 872 wall bracket on Sunday, 11th June 2006. It was then powered up.

Lantern warm-up video:

AC Ford AC 850 | Abacus AM301


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