There are 3 types of bulbs that work well as grow lights: metal halide, high pressure sodium (HPS), and fluorescent. Each type of light fixture has its own advantages and drawbacks. 1  Metal halide bulbs are compact and efficient, producing a very intense light from a small bulb.
The normalized difference vegetation index (NDVI) is a simple graphical indicator that can be used to analyze remote sensing measurements, typically but not necessarily from a space platform, and assess whether the target being observed contains live green vegetation or not.Contents.he normalized difference vegetation index (NDVI) is a simple graphical indicator that can be used to analyze remote sensing measurements, typically but not necessarily from a space platform, and assess whether the target being observed contains live green vegetation or not. Contents.
Changes in normalized difference vegetation index (NDVI), which calculated from ground-based canopy hyperspectral reflectance data, and leaf area index (LAI), which measured at the time of spectral measurements, were monitored during rice (Oryza sativa L. cv. TNG 67) growth and yields were harvested at maturity so as to determine the NDVI-LAI relationships and the optimal timing to use these...