Derby's Street Lighting PFI Contract - Duke Street, Darley Ward

Seq. No.	Lamp Number	Location	Lamp Type	Watt	Isolation Point
1	27184	OPP SOWTER RD	SONE	150	Y
2	27185	ON GREEN AREA	SONE	150
3	27186	OS NO 18	SXPL2	35
4	27187	OS NOS 22/24	SXPL2	35
5	27188	OS NO 26	SXPL2	35
6	27189	ADJ NO 28	SXPL2	55
7	27190	OS SCRAP YARD	SXPL2	55	Y
8	27191	REAR NO 38	SXPL2	35
9	27192	FP RR RIVERMEAD HS	SXPL2	35
10	27193	FP OS RIVERMEAD HS	SXPL2	35
11	113234	OS RIVERMEAD HS	SOXL	35
12	27194	FP OS RIVERMEAD HS	SXPL2	35
13	27195	FP OS RIVERMEAD HS	SXPL2	35
14	113235	REAR R/MEAD HOUSE	SOXL	35
100001	106888	NEARLY OPPOSITE SOWTER RD	FL	8
200001	107055	JUNC HANDYSIDE ST	N/A	N/A	Y

The following photographs were taken on Saturday, 19th March 2011.

Two Thorn Alpha 8 lanterns attached to 8 m tubular steel columns were first from St Mary's Bridge. The replacement columns are 6 m in height.

The first lantern was group-switched from elsewhere; hence, the lack of a photocell control.

The second lantern was individually switched, however - a Royce Thompson SC1000 was fitted.

A nearby footpath joined the road at this point; the lighting being located on the record for Britannia Court.

1 91081 OPP NO 14 SONE 0 70

The record for this lamp suggests that a 70 Watt SON lantern was installed here in 1997; however, the installation now supported a Philips FGS 103 35 Watt SOX lantern; the Stainton hinged column still appeared reasonably new, and was perhaps a later replacement.

A Royce Thompson Oasis 2000 70 Lux photocell was fitted to the FGS 103.

The next outgoing column on the footpath was older, but it too had had its original lantern replaced:

2 91082 FP REAR OF NO37 SONE 0 70

A Philips Iridium was attached to the column's spigot. This lantern pre-dates the PFI; it being fitted in place of a GEC Z5699 when the supply cable was changed from being group-switched to being permanently live in 2006 in order to supply some CCTV cameras. The Z5699s were not fitted with their own photocells; with the result that they all operated continuously after the group-switching control was decommissioned. One was saved into my collection after these individually-switched Iridiums were fitted instead.

Returning to Duke Street, the columns now decreased in height from 8 m to 5 m. A top-entry Thorn Beta 5 was fitted here.

This column is likely to have once supported a side-entry 80 Watt MBF lantern, but was later converted to the far more energy efficient SOX lighting; the side-to-top-entry converter elbow being fitted at the same time.

Another column around the corner also accommodated an Iridium; this replacing a SOX lantern in the mid-2000s, in response to antisocial behaviour in the area after nightfall.

I dislike the appearance of this installation - the size of the Iridium looks out of proportion to the rest of the column.

A nearby 6 m column had also had its lantern (a 55 Watt SOX, but would have been a 125 Watt MBF installation when new) replaced with an Iridium.