F21VLevel 3
FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF
**Definition:** This place covers:
Functional features or details of lighting devices or systems of lighting devices, for example:
Aspects related to light emission or distribution:
Aspects not related to light emission or distribution, e.g. fittings:
Lighting devices combined with articles having a primary function unrelated to lighting that are not otherwise provided for.
**Glossary:** - Light source: The entity (e.g. light bulb, fluorescent tube, gas mantle or combustible charge) that generates light for a lighting device.
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