FIELD: lighting.
SUBSTANCE: invention relates to lighting devices. Luminary configured for attachment to a ceiling of a space to be illuminated, comprising a casing, a fixture for securing a lighting component to the casing, a wireless transmitter module comprising an antenna located in the casing and a securing component to secure the luminary to a ceiling plate.
EFFECT: securing component may be configured to space the casing from the ceiling plate to provide an air-gap between the casing the ceiling plate, whereby the casing constitutes a resonant cavity for RF energy transmitted from the antenna, the air-gap being dimensioned to radiate RF energy from the antenna to the environment externally of the casing.
15 cl, 7 dwg
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