What are "Luma-lite" and "Polilight" categorized as?

Luma-lite and Polilight are categorized as alternate light sources because they are specifically designed to enhance the visualization of latent fingerprints and other evidence on various surfaces. These devices emit specific wavelengths of light that can excite certain chemical compounds or react with residues left by fingers, making them more visible to the examiner.

In the context of latent print examination, these light sources provide crucial support for identifying fingerprints that may not be detectable under ambient lighting conditions. By altering the wavelength and intensity of the light, examiners can optimize the detection of different types of residues, which may vary depending on the surface and the environmental conditions.

Understanding their role as alternate light sources helps examiners utilize advanced techniques in forensic science, enhancing overall accuracy in fingerprint analysis. The other options do not fully encapsulate the primary function of Luma-lite and Polilight, which is focused on illumination rather than direct fingerprinting or chemical development.