High Output LED in hybride belichting: monitoring praktijkproef bij Alstroemeria

In order to increase the intensity of the artificial light with the least possible electricity costs, an Alstroemeria production company experiments with a Hybrid light installation. The Hybrid lighting was created by complementing the existing 61 μmol/m2 HPS lamps with 21 μmol/m2s Philips High Output (HO) LED lamps to a total intensity of 81 μmol/m2s. The performance of this hybrid lighting was investigated between January 2017 and May 2019 and compared with the existing HPS installation (62 μmol/m2s) and with Regular Output (RO) LED at an intensity of 79 μmol/m2s. The light sum in the Hybrid lighting was 288 Mol/m2 higher than in the HPS reference (4%) thanks to the 33% higher light level and the 442 more burning hours of the HO LED, and yielded 8% more production (longer, heavier stems). The light sum in the LED treatment was 215 Mol light (3%) higher than the reference, due to 33% higher intensity but was used as many hours as the HPS lamps, and increased production by 6% (more branches). Of the three systems, the Full LED option is the most energy-efficient and
the Hybrid lighting had the lowest EUE (electricity use efficiency). The research was funded by the program “ Greenhouse as Source of Energy” of the Dutch Ministry of Agriculture and LTO Glaskracht, the Knowledge Cooperative Alstroemeria, Philips Lighting and Fa. Vreugdenhil.