The demo as described is kind of silly… it's easy to get two bulbs to appear to generate the same color white light reflecting off a given background; there are

The demo as described is kind of silly… it's easy to get two bulbs to appear to generate the same color white light reflecting off a given background; there are at most 4-5 variables to adjust (given that humans have 4-5 different classes of light sensors). A group of 5 LEDs (red, yellow, green, aqua, blue) could be made to pass this test but would render colors terribly. Color me impressed when participants can't tell the difference between rainbows generated by each light passing through a prism – that would be a much better test of color rendering ability.