The difference between E27 and E14 bulbs lies in the size of the base.
An E27 bulb has a larger screw base (27 mm diameter) and is commonly used in standard fixtures such as pendant lights, floor lamps, and ceiling lights.
An E14 bulb has a smaller base (14 mm diameter) and is typically used in more compact fixtures like table lamps, wall lights, or decorative lighting.
The required bulb type depends on the fitting of the fixture, which is always specified in the product details.