Primarily it is the E27 bulbs that are the problem. Designed to ease people into simple replacement into the old light sockets 10+ years ago. Now in 2023 the ne

Primarily it is the E27 bulbs that are the problem. Designed to ease people into simple replacement into the old light sockets 10+ years ago. Now in 2023 the new LED products with the well designed power supplies work much better and efficiency. The author mentions renovations, but still using ancient fixtures, wiring and switches. A new house, or partial renovation, should now be wired with 24v for all wall and ceiling lights.