Patent ID: 9030089
Filing Date: 2015-05-12
Classification: A01G,F21V,H01L,H05B,Y02P

Abstract:
1. A lighting device for growing a plant comprising: a first semiconductor light-emitting element, a second semiconductor light-emitting element and a third semiconductor light-emitting element each having a peak emission wavelength in a range of 380 nm to 500 nm, the first semiconductor light-emitting element, the second semiconductor light-emitting element and the third semiconductor light-emitting element being different from each other in peak emission wavelength by not less than 5 nm; and a red fluorescent material which (i) is excited by light of at least one of the first semiconductor light-emitting element, the second semiconductor light-emitting element and the third semiconductor light-emitting element and (ii) has a peak emission wavelength in a range of 600 nm to 780 nm, the first semiconductor light-emitting element, the second semiconductor light-emitting element and the third semiconductor light-emitting element being connected in this order so as to constitute a single unit, (i) two or more of the units being connected to each other in series to constitute a semiconductor light-emitting element group, (ii) two or more of the semiconductor light-emitting element groups being connected to each other in parallel, and (iii) the two or more of the semiconductor light-emitting element groups being identical with each other in the number of the first semiconductor light-emitting elements, the number of the second semiconductor light-emitting elements and the number of the third semiconductor light-emitting elements, the first semiconductor light-emitting element, the second semiconductor light-emitting element and the third semiconductor light-emitting element being controlled together by a single power supply circuit.