conventional incandescent lamps (non-halogen) subject to wear. They must be replaced every 2 years, even if they are in good condition. An old lamp can be recognized by a black coating on the bulb.
Switch off the corresponding consumer before replacing the lamp.
Attention! Do not touch the lamp bulb with bare hands. Fingerprints under the influence of heat evaporate, settle on the reflector and contaminate it. Replace lamps only with lamps of the same design. Remove accidental fingerprints with a clean, lint-free cloth and alcohol.
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