ISHS Acta Horticulturae 418: III International Symposium on Artificial Lighting in Horticulture
A MICROWAVE POWERED LIGHT SOURCE FOR PLANT IRRADIATION |
| Authors: | A.J. Both, L.D. Albright, C.A. Chou, R.W. Langhans |
| Abstract:
A new high intensity electrodeless light source, powered by two microwave generating units, was evaluated and compared with fluorescent and air-and water-cooled high pressure sodium (HPS) lamps. Radiation measurements were taken in the following wavebands: 400–700 nm (photosynthetically active radiation or PAR), 700–800 nm (far red), 800–2800 nm (near infrared) and 2800–50000 nm (far infrared), for all four light sources. The distribution of the radiation output of the microwave lamp over the various wavebands closely resembled the output of a water-cooled HPS lamp, although the microwave lamp was capable of delivering much higher light intensities. The relatively small amount of radiation emitted in the infrared waveband makes the microwave lamp a promising light source for plant irradiation in growth rooms (phytotrons). | |
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