You should buy light bulbs with an E27 lamp holder type for this floor lamp. The bulb is not included, so any standard E27 bulb will fit. The lamp is not dimmable, so choose a non-dimmable E27 bulb. The maximum wattage is not explicitly stated, but typical E27 floor lamps usually support bulbs up to around 40-60 watts; to be safe, check the lamp's label or manual for the exact maximum wattage. The lamp allows three bulbs to be individually adjusted and tilted.