Since every object is unique, the first thing to consider is "what" you hope to see or detect. This along with the physical attributes of the object will determine which light is used.
- Select a light that is at least 10% larger than the object you want to examine, a larger light will give you more flexibility and light overall.
- To ensure greater illumination, the light source should be shaped to match the shape of the object.
- More light will be reflected and the image will be brighter the closer the light source is to the object for inspection.