Urbis z3s are extremely rare in the uk, I only know about the ones on the M25. They run 400w SON and are on 14m columns. One problem I have seen with Urbis z3s is that they sometimes loose there bowls! I am desperately trying to save one of these.

M25

These Urbis z3s are on the M25, they have photocells, unlike the zx3s. Lots of them are Dayburning because they are very old. There is also a bird on one of them, he is probably using it as a toilet!😂

As you can see in this picture, the left one has lost it’s bowl!

Here, you can see that the z3 on the right is dayburning.

The z3 on the right here has been changed to LED.