Thanks for the review. We really don't recommend positioning our lights on a north facing north wall but it's great it works for you. Again thank you for the review.
Thanks for your review Bill. At this time of year a good location is crucial to the performance of the lights so you could try swapping over the location of a working one with the non working one to see if that might be the issue? Please <a href="https://www.thesolarcentre.co.uk/pages/contact_us.html">let us know</a> how you get on.