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.
October 9 is National Depression Screening Day. Everyone experiences sadness from time to time, but depression is more than occasional sadness. October 9 is National Depression Screening Day (NDSD), an annual event to raise awareness of the disease and offer screenings for related mood and anxiety disorders. Depression, if untreated, can have harmful effects on the mind and body.