Digisine specialises in Bluetooth technology, an isn't necessarily a street light manufacturer. That said, they do have a few lighting products in the books, and one of those is this lantern. It is the larger 56W version, but there is also a smaller 20W version available. These lanterns are side-entry only.

Birmingham

A site off Cato Street has these lanterns equipped to angled-twin-arm brackets.

A photocell between both arms controls the lanterns.