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Artificial lighting system design for photosynthetic studies
Author(s) -
Mouget JeanLuc,
De La Noüe Joël,
Legendre Louis,
Jean Yves,
Viarouge Philippe
Publication year - 1992
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.280550211
Subject(s) - flicker , electric light , led lamp , artificial light , flashing , daylight , environmental science , standard illuminant , power (physics) , ballast , luminous flux , halogen lamp , light emitting diode , optics , electrical engineering , engineering , light source , physics , materials science , illuminance , quantum mechanics , metallurgy
Most artificial lighting systems operate with a 100‐120 Hz flickering, an undesirable condition for studies on photosynthesis, requiring a fluctuating (flashing light effect) as well as a constant light flux. The amplitude of this flickering depends on the type of lamps and on the power supply. Selected lamps and related power supplies providing a flickering‐free light source are critically reviewed. A new system is proposed, that combines a high intensity discharge lamp (simulating natural sunlight) with a high‐frequency (>40kHz) ballast. This power supply provides a flickering‐free light flux, and offers such advantages as the use of lamps with high energy output and long life expectancy.