Local OrangeTEK TerraLEDs
The modular TerraLED lantern is uncommon in Derbyshire; the examples that do exist are mostly to be found on residential roads, although a notable installation can be found on a section of the A601 St Alkmund's Way in Derby City Centre.
These examples can be found on Hardwick Close in Ripley. This estate was selected as a test-bed for trialling two types of LED lantern - the TerraLED and WRTL's Stela Square.
The two modules employed in this version of the lantern could both accommodate up to 30 LEDs; however, notice that only the two innermost clusters have had LEDs soldered to their PCBs; the rest of the modules are empty. For saying that these lanterns had seen less than three years' use at the time of photographing, corrosion was already forming on the aluminium lantern housing - this doesn't bode well for a lantern that should be designed for at least 25 years' worth of outdoor conditions!
These lanterns are switched using Zodion Super6 35 Lux photocells.
A short cul-de-sac, again in Ripley, is also lit with the TerraLED lanterns.
These lanterns also only feature 12 LEDs out of a possible 30 in each module.
New lighting was provided on St Alkmund's Way (one of the main thoroughfares in the City) as part of the road's reconstruction in 2013.
These lanterns are a far cry from the days of twin-lamp Atlas Alpha 8s lighting this section of the road.
The narrow profile of the LED lanterns can be appreciated in this view.
Six separate clusters housing either 24 or 30 individual LEDs provide the lantern's output. The construction of the lantern allows a minimum of two clusters (as seen above) and a maximum of eight clusters, depending on scheme requirements.
The lanterns are fitted with Telensa radio monitoring nodes instead of traditional NEMA photocells. This allows the output to be dimmed at quieter periods of the night, but also permits the remote alteration of any set dimming regimes as required.
The video below shows these lanterns in use:
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