Urbis Hestia 1 Lantern Installations
The Hestia 1 is the smaller of the Hestia lanterns by Urbis. They are now sold as the Hestia GEN2 for LED (documented separately). High-pressure sodium and metal halide versions (Such as CPO-TW or CDO-TT) were available, and for those older lanterns, an LED retrofit is offered by Indo Lighting for both the Hestia 1 and 2.
London
Some Hestia 1s and 2s exist along Wood Lane, White City Living. Something about these seems amiss at first glance though! These are not the GEN2 version, actually. Instead, these are Hestia 1s that feature Indo retrofit LED boards in them. The Hestia 2s also have this adaptation. To make identification easier, if you have a Hestia GEN2, then it will feature a turret on top for the NEMA socket - the original Hestias do not have this.
The next example definitely confirms there is no-such turret!