Besides having a wide color-temperature span ranging from 2,300 K to 9,300 K, it also emitted a significantly high color rendering index
, ranging from 74 to 84.4 for voltage increasing from 3.0 to 11.5 V (Figure 3).
As of February 9, 2011, for LED lighting devices with an input power of 25W, a color temperature of 3000K (GW5DMC30M04), and a color rendering index
(Ra) 83 (based on Sharp survey).
The Sylvania TRU-COLOR[TM] METALARC[R] CERAMIC family of metal halide lamps combines the attributes of conventional pulse starting with innovative ceramic arc tube designs for improved lamp-to-lamp color consistency and a high color rendering index
of 80-94 (CRI).
As with all GlacialLight down lights, the GL-DL10-SM comes in either Warm White (3000K), Neutral White (4000K), or Cool White (5700K) color temperatures all with a Color Rendering Index
(CRI) of 80.
The larger sphere better integrates light for more reliable testing of a device's photometric and colorimetric performance with measurements of Total Spectral Flux, Luminous Flux, Correlated Color Temperature (CCT), Color Rendering Index
(CRI) and Chromaticity.
* Color rendering, measured on a color rendering index
(CRI) scale of 0 to 100, is the ability of a light source to represent colors in objects.
In fact, the leading color-rendering authority now indicates that the Color Rendering Index
(CRI) may be overemphasized in most applications, and not the best metric for determining the suitability of LEDs for outdoor lighting.