Articles

Bye-bye CRI?

The CIE Colour Rendering Index (CRI) (CIE 13.3-1995) and the general colour rendering index, Ra, has for many years been the standard metric for the colour rendition performance of light sources, included in a wide array of...

The IEC addresses characterisation of the blue light hazard

Researchers around the world have raised concerns about the safety of LED lighting on a regular basis, with focus ranging from the impact of blue light to issues such as disability glare. In a multipart series of articles that...

Introduction to IEC TR 62778 (LS16 Poster and Presentation)

Driven by the desire to circumvent issues encountered in applying IEC & EN 62471, and to reduce the measurement burden of luminaire manufacturers, a new approach to the evaluation of the photobiological safety of luminaires is now...

Photobiological Safety of Lamps - History and Overview of Standards

Whilst the potential hazards associated with optical radiation have been long understood, up until recently, consideration of this has been mainly limited to a number of specific applications using intrinsically harmful lamps,...

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