Betekenis van:
luminous flux

luminous flux
Zelfstandig naamwoord
    • the rate of flow of light energy

    Hyperoniemen


    Voorbeeldzinnen

    1. Luminous flux
    2. Rated luminous flux;
    3. ‘Objective luminous flux’ means a design value of the luminous flux of a replaceable light source or light source module.
    4. The luminous flux of this gas-discharge light source may differ from the objective luminous flux specified in Regulation No 99.
    5. Maximum rated power (Pmax) for a given rated luminous flux (Φ) (W) Clear lamps
    6. Maximum rated power (Pmax) for a given rated luminous flux (Φ) (W)
    7. ‘Lamp Lumen Maintenance Factor’ (LLMF), which means the ratio of the luminous flux emitted by the lamp at a given time in its life to the initial luminous flux.
    8. The maximum rated power (Pmax) for a given rated luminous flux (Φ) is provided in Table 1.
    9. ‘Luminous flux’ (Φ), which is a quantity derived from radiant flux (radiant power) by evaluating the radiation according to the spectral sensitivity of the human eye, measured after 100 hours of lamp running time;
    10. ‘Luminous efficacy of a source’, ‘light source efficacy’ or ‘lamp efficacy’ (ηsource), which means the quotient of the luminous flux emitted (Ф) by the power consumed by the source (Psource). ηsource = Ф / Psource. Unit: lm/W.
    11. ‘Lamp warm-up time’, which is the time needed for the lamp after start-up to emit a defined proportion of its stabilized luminous flux;
    12. Maximum rated power (Pmax) for a given rated luminous flux (Φ) (W) Clear lamps Non-clear lamps Stages 1 to 5
    13. The intermediate values of both the luminous flux and the claimed incandescent lamp power (rounded to 1W) shall be calculated by linear interpolation between the two adjacent values.
    14. ‘Clear lamp’ is a lamp (excluding compact fluorescent lamps) with a luminance above 25000 cd/m2 for lamps having a luminous flux below 2000 lm and above 100000 cd/m2 for lamps having more luminous flux, equipped with only transparent envelopes in which the light producing filament, LED or discharge tube is clearly visible;
    15. ‘Utilisation Factor’ (UF) of an installation for a reference surface, which means the ratio of the luminous flux received by the reference surface to the sum of the individual total fluxes of the lamps of the installation.