Bulbs with a bayonet fastener must be changed as follows:

Removing the bulb

– Lightly press the defective bulb into the bulb holder, then turn it anti-clockwise and remove it.
– Do not touch the glass part of the new bulb with your bare hands, use a cloth or paper towel instead.

Fitting the bulb

– Fit the new bulb, pressing it into the bulb holder, and turn it clockwise as far as it will go.
– If necessary, use a cloth to remove any fingerprints from the glass part of the bulb.