A suggested list of lighting equipment and setups that I would use for the following scenario

- background fitting to the style of interview - such as if it were a formal interview (news etc) a plain screen background or a background to determine the location on a green-screen / if an informal interview, i would like the audience to get to know the person, so would film in a comfortable place such as their own home. The background would be arranged according to the persons personality or a way of representing what the interview is about. For example if the interview was about living in poverty, it would be filmed in a messy, run down council house. 

'Talking Head' style video

- high key/natural lighting - this is so the face and shoulders are at full visibility and creates a formal mode of address. CONS - natural sunlight can change such as when clouds pass over and will shift positions as time passes. This can be an issue with a long interview as the lighting does not stay continuous leading to a jump in light levels if you were to cut a clip from the beginning and middle together.

"There is a traditional lighting setup used for interviews called three point lighting. This setup involves a key light which is the main source of light pointing at the subject. If you have the luxury of seeing the person before the interview you can choose which side of the face to put the key light. You can complement their features by looking at the subject’s face and casting shadows to compensate for any asymmetry.
You may also use a fill light to balance out the amount of light falling on one side of the face and a back light which will help them to stand out from the background. Once you have mastered this technique it is possible to innovate, experiment and chop and change lighting setups to get across the desired tone for the interview.
The DOP or lighting camera person should know the story and tone of the interview prior to arriving on location so they can design their lighting to suit the message you’re trying to deliver to the audience or the mood we want to evoke."

A night time shoot

When filming at night, colours are less intense so I would use reflectors to bounce off the light onto my subject. Also, wet ground can help reflect light and will help illuminate the scene. Light from streetlamps and cars will be reflected also helping to add interest and mood to the scene.