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Portable luxmeter for measuring illuminance, luminance, PAR, irradiance (across VIS-NIR, UVA, UVB and UVC spectral regions or measurement of irradiance effective according to the UV action curve). Storage of maximum, minimum, average value. Functions: REL, HOLD and auto power off which can be disabled, IP 67 protection degree. LP471 series probes with...
Knowing the ratio of red to far red can help you determine plant spacing and decide when to apply plant growth regulators. Greenhouses with a high canopy closure or canopy density may require more applications of plant growth regulators to maintain plants at commercial size.