This product has a socket for E27 bulbs. 1 bulb can be inserted or screwed into the lamp. Whether a bulb is screwed or plugged in depends on the socket used for the lamp and the matching base of the bulb. To make your decision easier, we offer you a suitable selection of lamps on this page in the lamps section, or simply add this product to your shopping cart to get a suitable selection of lamps. The advantages of luminaires with lampholders: The advantage of this technology is that you can easily replace a defective luminaire with an inexpensive bulb without having to dismantle the entire lamp. In addition to classic light sources, you can also use dimmable light sources or smart home light sources, which you can control in many ways. You can also often choose from a wide range of lamp shapes and light colours.