Color Temperature vs. IRE
We measured the Runco CL-710, as shown in the Color Temperature vs. IRE chart, in its most accurate setting with high-definition test patterns. The blue line indicates our measurements without adjustments. It reads about 6200 Kelvin with dark gray images and drifts upward to 7200 Kelvin as you reach a peak white image. This is a difference of 1000 Kelvin. After calibration by a qualified service technician, the projector’s image (shown on the chart in red) measured around 6700 Kelvin with dark gray images and 7100 Kelvin with peak white images, but was near 6500 Kelvin across most of the middle of the range. Total variance was about 600 Kelvin. This is acceptable performance.

» See chart 
» See general explanation of color temperature vs. IRE

CIE Diagram
The Runco projector’s color points roughly match with those specified by SMPTE for HDTV displays. The green color point is mildly unsaturated, which will prevent lush, rich green images. But because the point is close to the green axis of the triangle, other colors will be reasonably near their intended hues. The gray scale hovers on or near the 6500 Kelvin mark, but is more tightly grouped near 6500 Kelvin after a decent calibration. This makes the image slightly more neutral, though still vibrant in color.

» See chart 
» See general explanation of CIE Diagrams

» See our review of this product, "More than Just a Blue Light Special," by Editor Mike Wood