I think I've found them (BA15D)
https://www.sunshinesolar.co.uk/Item/BA15SWW-2?msclkid=4a8cc45dff9f1e76e4b6acda6d4b6aac&utm_source=bing&utm_medium=cpc&utm_campaign=Shopping%20All&utm_term=1101501487136&utm_content=Products
One circuit was turned off, lights are fine.
That would be the light source when I took the photo. All are the same.
They are internal ceiling lights, still no wiser as to what bulbs they are.
If you get a shock, you should go to A&E and get checked. The shock can upset the heart's rhythm, and all can be fine for a while, then lights out and goodnight Vienna.
Why not use it to your advantage. Wait for thousands to land, then sweep them away, just leaving the legs. You can the explain that it is an expensive new exterior flock finish.