LED refers to the presence of an integrated Light-Emitting Diode, with the specifications being indicated on the dedicated page of each item. These products do not require any bulb but do need a driver (power supply), which can be included or ordered separately. The 9010novantadieci LED items offer a truly superior light and chromatic yield compared to traditional light bulbs. The LED component is always accessible and replaceable without doing masonry work. Other versions include a bulb holder, as indicated, which (unless otherwise specified) require a bulb that is not included. The GU10 bulb holder can connect bulbs of different diameters – Ø35, Ø50 or Ø111 – depending on the item, which can be seen on the dedicated page.