Spectral Signatures and Dynamic Range: Documenting Light-Based Artworks with Spectrometry and HDR Imaging

Abstract Light-based artworks present distinct conservation challenges due to the elusive nature of light phenomena, variable viewing conditions, and evolving illumination technologies. Traditional documentation methods often fail to capture the full perceptual and material complexity of these works, complicating efforts to preserve their integrity over time. This paper explores how targeted spectrometry and high dynamic range (HDR) photography can bridge critical gaps in documentation, using artworks with colored gas–discharge lamps in the Norton Simon Museum’s collection as case studies. These techniques provide more precise, reproducible records of light’s visual appearance and behavior, supporting informed conservation strategies. Their application demonstrates the need for responsive, media-specific approaches within contemporary conservation practice.