| 摘要 |
The invention relates to a plant illumination device for exposing to light plants that are to be grown in a greenhouse, which plant illumination device comprises: at least one lighting fitting with a first light source, which first light source is an assimilation lamp in the form of an incandescent lamp or a gas discharge lamp, the first light source having a first spectrum, and said first light source having a power of at least 250 W; —at least one additional lighting unit (5) with an additional light source, which additional light source has an additional spectrum which differs significantly from the first spectrum, and in which the additional spectrum complements the first spectrum in at least a wavelength range which plays a role in a biological process in the plants to be exposed to light. |
