1. why is photographing lightning a difficult process?

2. what piece of equipment is in capturing lightning photographs?

3. why is it important to mentally prepare for photographing lightning?

4. what time of day should you try to photograph lightning?

5. why is composition important in lightning photographs?

1. Why is photographing lightning a difficult process?
Some reasons which come to my mind for saying this are: 1) You get only one chance for the particular situation - it is not like portrait photography where you can go back in the studio if the photos didn't come out well; 2) lightning varies so much in brightness, intensity and location that guessing the proper exposure requires a lot of experience, as well as luck; 3) you are always at some risk when photographing worthwhile lightning; and 4) lightning is a point (line) source, and demands the most of the optical quality of your camera 

2. What piece of equipment is helpful in capturing lightning photographs?
SLR camera with B-shutter speed (preferably SLR; you might try using your digital camera, if it has B mode, but this is much more difficult)lenses ranging from 28mm to 135mm at minimum. Fixed-focal lenses are preferred over zoomlenses. Aperture ranges should be f/2.8 - f/22.sturdy tripod (metal or plastic doesn't make any difference whatsoever at all in safety - if lightning is so close by, you are in trouble anyway)cable release, which can be lockedSlow-speed film: 100 or 200 ISO

3. Why is it important to mentally prepare for photographing lightning?
When photographing lightning, it’s important to realize that the conditions you are shooting in are unpredictable and dangerous, and there will always be an element of chance and luck involved. So you should prepare yourself.

4. What time of day should you try to photograph lightning?
Nighttime lightning photography is the easiest type

5. Why is composition important in lightning photographs?
It boosts or adds drama to your picture. 

It should be b i believe