R14 European E14 light bulbs has been used in many small fixture applications that have come over from Europe. The R14 is fewer than two inches across the face of the reflector. The E14 base is slightly larger than a candelabra light bulb base. It’s sometimes also known as a European base.

What are the different bulb base sizes?

• E26/E27 Medium – Edison 26-mm or 27-mm Diameter.
• E12 Candelabra – Edison 12-mm Diameter.
• E14 European – Edison 14-mm Diameter.
• E17 Intermediate – Edison 17-mm Diameter.
• E39/E40 Mogul – Edison 39-mm or 40-mm Diameter.

What are E17 bulbs?

Intermediate Screw Base (E17) Bulbs are sometimes called Intermediate Edison Screw (IES), “E” stands for “Edison” and “17” indicates the diameter in millimeters as measured across the peaks of the thread on the base, e.g., E-17 base bulbs have a diameter of 17 mm.