Den wrote:
Group:

I've got a light fitting in a shaded area. I need to fit one of
these screw-in photo-cell adaptors to it. Does anyone have any
recommendations about models to look at / avoid. In particular I
need to be able to adjust the sensitivity of the unit as (as I've
said) the light fitting is in a shaded area.


You can buy just the photocell. Install it in series with the light circuit
and mount it where the sensor gets full sun.

In my case, a garage, the outside light was activated by a switch inside the
garage. It was a simple matter to mount the sensor on the other side of the
wall (outside) from the switch. All the wiring was right there.