For single-ended light bulbs: light bulbs which do not operate on dimmer switches shall be labelled, and the relative size and shape of the light bulb compared to a conventional incandescent lamp shall be indicated on the packaging.
Pri žarnicah z enojno vijačnico: žarnice, ki ne delujejo na zaslonska stikala, morajo biti označene in na embalaži opisane ustrezne mere in oblika žarnice v primerjavi s konvencionalnimi žarnicami.