Local Simplex Aries'
The Aries was something of a latecomer to Derbyshire - it only appeared towards the end of the 1980s and then through to the mid-1990s. It was used as a replacement for Thorn Beta 7 mercury lanterns - the 35 W and 55 W versions replacing the 80 W and 125 W Beta 7s respectively. Both the gear-in-head and gear-in-base versions of both were ordered, with both types using either a NEMA socket or two-part cell - so there is quite a bit of variation.
This example appears to have the gear in the base. An SS3DR cell is fitted now however an SS4 was fitted previously.
A two-part cell is fitted to this example but apart from that the lantern is identical.
This 35 W Aries was seen dayburning shortly after a particularly warm spell in July 2006 - the SS4 here might well be original and the extra heat could have melted the solder to a connection inside the unit. The faulty cell was later replaced with a Royce Thompson Monostar 1000.
Another two-part cell - this time fitted to a 55 W version. (The night time shot is like that due to subsidence - definitely nothing to do with me not having the tripod set up properly!)
This 55 W example is installed on a road which runs parallel to the busy A38 at Markeaton Roundabout. 55 W seems a little too bright for a road which comes to a dead end and only serves several properties; however before the A38 opened in 1983, this would have been a much busier road. The road was probably originally lit with 55 W; so the trend was continued when the dual carriageway went in.
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