I think it's very helpful.
I'm constantlybanging on about
Color Rendition Index on this forum and elsewhere and nobody takes a blind bit of notice, with people constantly confusing colour temperature with colour rendition, and stating that it can be corrected in PP - which is an "interestiong" bit of misinformation.
The simple fact of the matter is that CRI is vitally important in all types of photography (and especially colour). Daylight, flash and tungsten (the old fashioned filament lamp) lighting produces light across the entire colour spectrum, which means that all colours are reproduced accurately. Fluorescent lamps and LED lamps have a discontinuous spectrum, which means that different colours are not rendered equally.
And, to make matters even worse, although even the "good" makes of discontinuous spectrum lights are nowhere near as good as Daylight, flash and tungsten lighting, the worst of them are truly appalling. Very often, sellers of these lights either don't state the CRI value or state it falsely (perhaps knowing that most people don't even know what it is, don't know why it matters and have no means of testing the veracity of their statements). And because anything sold as "professional photographic lighting" carries a price premium, many of the so-called "photographic lights" sold on Ebay, Amazon and elsewhere are in fact just household or security lights in terms of their LED components.
The downside of
http://woodgears.ca/misc/led.html is that he compares household-quality CFL lights with LED lights and concludes that LED is the answer. What he should really do is to compare both CFL and LED to daylight, flash and tungsten lighting.
