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LED Lamps
Explanation of Terms

Information Provider • The company/individual (specified person) who has submitted the specified information in respect of a product model under section 6 of Energy Efficiency (Labelling of Products) Ordinance, Cap 598.
Reference Number • The number assigned to a product model by the Director of Electrical & Mechanical Services under section 8 of the Energy Efficiency (Labelling of Products) Ordinance, Cap 598.
Year • The "Year" means the year in which the reference number is assigned or, where the energy efficiency grading is calculated in accordance with the new calculation method under section 12 of the Energy Efficiency (Labelling of Products) Ordinance, the year in which the new calculation method takes effect.
Brand • The name used by a manufacturer or importer to identify a product range.
Model • The particular name and/or number used by a manufacturer or importer to identify an individual product within a brand.
Energy Efficiency Grade (1 to 5) • The energy efficiency grade calculated in accordance with the latest edition of Code of Practice on Energy Labelling of Products. Grade 1 being the most efficient and Grade 5 being the least efficient.
Luminous Efficacy (Lumen/W) • Means a ratio of measured luminous flux emitted by a lamp to the measured electrical power consumed by the lamp as presented in the test report submitted to EMSD for assignment of reference number.
Rated Luminous Flux (initial) (lm) • Means the luminous flux of an LED lamp as determined and declared by the manufacturer or importer of the LED lamp in accordance with the standard and requirements specified in the Code of Practice on Energy Labelling of Products (approved Code of Practice).
Rated Power Consumption (initial) (W) • The power input of an LED lamp as determined and declared by the manufacturer or importer of the LED lamp in accordance with the standard and requirements specified in the Code of Practice.
Measured Luminous Flux (lm) • Means the luminous flux of an LED lamp measured in accordance with the standard and requirements specified in the Code of Practice on Energy Labelling of Products (approved Code of Practice).
Measured Power Consumption (W) • The power input of an LED lamp measued in accordance with the standard and requirements specified in the Code of Practice.
Standy Power Consumption (W) • Means the power being used when the LED lamp lamp is in "standby mode".
Displacement Factor • Expressed by cosϕ, where ϕ is the phase angle between the fundamental of the mains supply voltage and the fundamental of the mains current.
Lumen Maintenance (at 6000 hrs) (%) • Means the lumen maintenance of an LED lamp as determined and declared by the manufacturer or importer of the LED lamp in accordance with the standard and requirements specified in the Code of Practice on Energy Labelling of Products (approved Code of Practice).
Colour Rendering Index (Initial) • Means the photometric code or the colour rendering index, colour designation of an LED lamp lamp giving white light as defined by the correlated colour temperature and CIE 13.2:1974 general colour rendering index.
Colour Rendering Index (at 6000 hrs) (Initial) • Means the photometric code or the colour rendering index, colour designation of an LED lamp lamp giving white light as defined by the correlated colour temperature and CIE 13.2:1974 general colour rendering index.
Lamp Cap • The type of LED lamp base for making electrical connection.
Lamp Colour • The colour appearance of the LED lamp.
Colour Temperature (K) • The colour appearance of the LED lamp, measured in Kelvin (K) as declared by the manufacturer or importer of the LED lamp.
Place of Manufacture • The place/country in which the CFL is manufactured.
Product being Supplied by Information Provider • Whether the Information Provider still supplies the product model in Hong Kong.
Supply Information Last Updated Date • The date on which the Information Provider notified the Electrical & Mechanical Services Department on whether he still supplies the product model in Hong Kong.