Whilst browsing Ebay , I noted another type of SOX retrofit lamp, rather than the more common Magnatech or INDO type, mentioned a few posts back.
This one is made by Venture Lighting. An impulse buy and a few days later...
Looking on line, it doesn't seem to be listed by Venture Lighting themselves anymore, I couldn't find any stockists either, although a search did show up an image of an older version of the lamp with differently designed vents.
Unlike the INDO/Magntech designs which use a small number of high powered LEDs, this design has 3 rows of LEDs with 28 per row, so 84 LEDs in total. The heatsink is covered by the overall translucent sleeve, so it will rely on cooler air being drawn through the tube to dissipate the heat. After several hours running it was only slightly warm however. The design obviously isn't waterproof, so how it performs in leaky Beta 5s will be of interest. The bayonet cap is rotatable with respect to the main body.
Literally the day after it arrived, I noticed a Beta 5 in my village with a failed lamp, had been fitted with a LED retrofit.
The triple row of LEDs clearly being visible, meaning it couldn't be an INDO or Magnatech variant.
Daylight confirmed, it was the same lamp I had purchased. The V of the Venture logo could be made out through the bowl.
At night, it was surprisingly effective, dare I say it, a better light spread due to the soft cut off characteristic of SOX lanterns, than the hard cut off of the Luma next to it.
Wiltshire have probably now made the decision for a wholesale conversion to LED with dimming and expansion of CMS. Dimming will mean new lanterns, so it will be interesting to see if this is a temporary installation, or whether a less ambitious LED program - especially in rural areas like mine which aren't covered by CMS at present, will see LED retrofits as a more cost effective solution. However, the Beta 5s in my village aren't generally that water tight.....