
Our French Deco ceiling light comes with E14 fittings, for which bulbs are scarce in the US, while E12 ("chandelier" with socket) bulbs abound available. These gearboxes were the obvious solution. They didn't seem to work at first, but I just didn't tighten them enough. The downside, if any, is that after a few days of use the earbuds seem to have become permanent residents... although I don't see that as a problem. Good product at a very good price.