158. Edensor, Chatsworth Estate Attached to several of the properties in this pleasant Derbyshire Dales hamlet are various top-entry bowl-less lanterns; the majority of these comprising Thorn Beta 4s. As the village forms part of the Chatsworth Estate, and is in the ownership of the Dukes of Devonshire, the lighting is also privately owned and maintained, which explains how it has survived any sort of alteration that would have occurred to similar installations in other villages where the lighting is maintained by the Local Authority.

The first installation pictured is roughly opposite the entrance to the imposing structure of St Peter's Church. A Wardle 'Murray' lantern is fitted here. Notice the interesting 'modification' that has been made to the installation's ESLA control box, in order to accommodate a one-part NEMA photocell. Incidentally, although the photocell appears to be a black 'dummy link' photocell for bypassing a NEMA socket, it is a regular Zodion photocell that has had its outer circumference painted black (leaving just the top section clear); presumably, to prevent the photocell from being deactivated by the lantern - notice that the lamp is roughly in-line with the photocell.

     

An identical setup existed for the next installation.

 

The ironwork is finished in an attractive cerulean shade.

 

The lanterns appear to be fitted with self-ballasting mercury vapour (MBFT) lamps, as evidenced by the 2-BC lampholder visible in this lantern. Although the Murray was not designed to be fitted with a separate bowl, when new, the lamp would have been surrounded by an acrylic refractor ring; the fixing screw positions for this can just be seen on the inner circumference of the lantern.

 

This Thorn Beta 4 is the first lantern to be seen when entering the village from the main road.

 

The outreach on this bracket is slightly longer than those already seen.

 

A few lengths of electrical conduit provide the means of the supply cable's entry into the bracket.

 

The polycarbonate bowls fitted to these lanterns appear to have had their lower halves cut away, exposing the lamp to the atmosphere. Judging by how discoloured the polycarbonate has become, perhaps the bowls were modified in this way in order to improve light output - MBFT lamps produce a relatively poor amount of light for the power that they consume.

 

This example was mounted a little higher up the side of this property.

 

The bowl on this example had similarly been reduced in depth - the noticeably off-centred nature of the cut on this example suggesting that this work was done by hand.

 

The bracket on the next light was installed the opposite way around to the rest (with the decorative support strut being located beneath the main bracket, instead of above it); the reason for this likely to be in order that the the lantern was as mounted as high on the wall as was possible without the roof overhang fouling the bracket. On the right, note the photocell addition made to this example's fuse box - I assume that the enclosures that support the NEMA sockets are bolted through the fuse box doors.

     

The bracketry attached to this property was another that had avoided being painted the familiar teal colour.

 

A Royce Thompson P5 thermal photocell switched this example. I assume that a lamp was fitted, even if the lantern appears to be devoid of such a key component in this view!

 
 

Finally, we head back onto the main road in order to view the lighting installed on the Grade II* listed Tudor Lodge, which dates from Victorian times!

 
 

Uniquely to these lights, the bracket is painted gloss black; however, the lantern's canopy remains in its unpainted aluminium finish.

 

This zoomed-in view reveals just how thick the polycarbonate bowl is - another factor in reducing output as the plastic discoloured.

 
 

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