Combination of deuterium and tungsten-halogen light sources that covers a wide spectral range is useful help to study a sample that has multiple features in different areas or analyze a variety of different samples in the lab. From measuring organics and small molecules to the near-IR absorption of plastics and polymers, a combination light source allows to extend the capabilities of measurements. Using a combination of two lamps or a single lamp that has a wide spectral output, the entire UV-Visible-NIR range can be explored by Continues Light Sources- Deuterium-Tungsten Halogen UV-Vis-NIR category.