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.
There are three types of DVI connections: 1. DVI-D (Digital) 2. DVI-A (Analog) 3. DVI-I (Integrated Digital/Analog) DVI-D - True Digital Video ; DVI-D format is used for direct digital connections between source video (namely, video cards) and digital LCD (or rare CRT) monitors.