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> Even today, as good as LEDs have gotten, their color rendering is still noticeably worse than incandescents. (The highest scores are around 80-90 CRI, an old-
by the_pwner224 4y ago
> Even today, as good as LEDs have gotten, their color rendering is still noticeably worse than incandescents. (The highest scores are around 80-90 CRI, an old-fashioned bulb is the standard at 100.)
This is false.
Good quality LEDs are >90 CRI, and the higher end ones are 95+. These are not common because everyone is busy selling/buying the cheapest crap they can make/get, but they're definitely not hard to get either
Ikea Ledare is a widely available >90 CRI bulb. The Ledare is also flicker free and has a metal heatsink base and good reputation for longevity/reliability (on the standard 800lm ones, the higher power ones seem to be more hit-or-miss depending on the exact model). However 99% of people aren't willing to spend $4-5 per bulb.
High end COBs, like the Bridgelux Thrive, are pretty much perfect. Close enough to 100 that the difference doesn't matter. The Thrives have been out for a number of years now. They're not much more expensive than normal LED COBs. These sort of emitters just haven't made their way over to consumer products yet, because (sadly) nobody cares about light quality so there isn't much of a market.
- throw0101a 4y ago> This is false. > Good quality LEDs are >90 CRI, and the higher end ones are 95+. High CRI is fine, but it's not something we should be completely satisfied with: > R_a is the average value of R1–R8; other values from R9 to R15 are not used in the calculation of R_a, including R9 "saturated red", R13 "skin color (light)", and R15 "skin color (medium)", which are all difficult colors to faithfully reproduce. R9 is a vital index in high-CRI lighting, as many applications require red lights, such as film and video lighting, medical lighting, art lighting, etc. However, in the general CRI (R_a) calculation R9 is not included. * https://en.wikipedia.org/wiki/Color_rendering_index#Special_value:_R9 https://en.wikipedia.org/wiki/Color_rendering_index#Special_... > The most commonly used value of CRI is called Ra, which is the average value of the first eight indices (R1-R8). Lesser-known but more accurate is the extended CRI (Re), which uses the average value of R1-R15 and thus serves as a more accurate measure of color fidelity given that it takes the rendering of more colors into account. * https://en.wikipedia.org/wiki/High-CRI_LED_lighting#CRI,_Ra_and_Re https://en.wikipedia.org/wiki/High-CRI_LED_lighting#CRI,_Ra_... See: * https://en.wikipedia.org/wiki/Color_rendering_index#Alternatives https://en.wikipedia.org/wiki/Color_rendering_index#Alternat... * https://en.wikipedia.org/wiki/Color_quality_scale https://en.wikipedia.org/wiki/Color_quality_scale High CRI / Ra scores are fine for what they are, but they do not measure the entire 'colour reality', so when the GP says that CRI scores are 'lacking'—even ones in the 90s—they're not wrong. Current LEDs may match the CRI scores of incandescents, but incandescents may still produce results that are better outside of what CRI measures. Of course this may only matter to those of us who remember incandescents: the younger you are the more likely you lived your life never experiencing incandescent, and so LED is "normal" and "fine". Regardless: CRI was a decent place to start, but it'd be nice if we could collectively raise the bar.
- the_pwner224 4y agoYep. Take a look at the datasheet for the Bridgelux Thrive chips - they have a plot of intensity/wavelength of the LEDs compared to a black body radiator, it's pretty much identical even deep into the reds. Of course, that means it is also very close to 100 on all the R numbers.
- aitchnyu 4y agoI'm Indian and I've been trying to import warm white, high CRI lights but I can't figure out which ones are warm white and support 230V and B22 Bayonet holders.