Are E10 and E14 cabochon lamp holders interchangeable?

No, E10 and E14 cabochon lamp holders are not interchangeable. Their physical size difference makes them incompatible with each other’s fittings.

Reasoning:

The “E” in the bulb designation stands for Edison Screw, and the number indicates the diameter of the base in millimeters. An E10 bulb has a 10mm diameter base, while an E14 bulb has a 14mm base. This size difference is fundamental: E10 and E14 bulbs are not interchangeable because they are compatible with different lamp holders. The varied sizes mean each bulb type requires its own specific holder, and using the wrong one would not fit properly

The installation requirements also differ, as E10 cabochons require a 14mm mounting hole, while E14 cabochons require a 20mm hole. This further confirms that the lamp holders themselves are designed for their respective bulb sizes only.

Conclusion:

E10 and E14 cabochon lamp holders are not interchangeable due to their differing base diameters (10mm vs. 14mm). Each bulb type requires its own compatible lamp holder, and attempting to interchange them would result in an improper fit