This product features a socket for E27 light bulbs. You can insert or screw in one light bulb into the lamp. Whether a light bulb is screwed in or plugged in depends on the socket used in the lamp and the corresponding base of the light bulb. To make your decision easier, we offer a suitable selection of light bulbs in the light bulb section on this page, or simply add this product to your cart to receive a suitable selection of light bulbs.