When taking photos in the lighting studio, I have used to types of lighting so far: continuous lighting and flash-heads.

Continuous lighting uses a light that is always on and used as the main source of light for the photo. In the photographs that I have taken, there is a back light used underneath the objects on the product table.

Flash-heads connect to the camera via a flash trigger so when the photo is taken, they flash and create a photo with little or no shadows in it (as shown below).