What is a commonly used light source when searching for latent prints?

A flashlight is a commonly used light source when searching for latent prints due to its versatility and portability. Flashlights provide sufficient illumination to effectively visualize the fine details of surfaces where latent prints may be located. They are easily accessible and can be directed to specific areas, allowing examiners to focus on potential print locations.

Unlike other options, while a laser pointer can provide pinpoint illumination, it may not be ideal for the broader illumination needed to search surfaces comprehensively. Neon lamps and incandescent bulbs, on the other hand, may not provide the specific wavelengths of light that enhance the visibility of latent prints, particularly when considering the varying surfaces and environments that an examiner may encounter. Using a flashlight allows for a balance of portability and effectiveness in exploring various surfaces for latent prints.