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.
The main difference between these two is that VGA is an analog standard while DVI is digital. DVI is next logical step for connecting your computer and monitor.Video signals are originally digital signals but are converted into analog before leaving the GPU of your computer through the VGA port.VGA was created because all of the monitors at that time are based on CRTs which were analog in nature.. DVI is digital while VGA is analog. 2. VGA is for CRT monitors while DVI is best for LCD monitors. 3. Using VGA for LCD monitors leads to multiple conversions that might slightly alter the final image. 4. DVI is newer and would soon make VGA obsolete.