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<blockquote data-quote="Rob Timmerman" data-source="post: 141501" data-attributes="member: 172">Re: Chauvet Slim par 64 vs Pro RGBARGB, RGBA, and RGBW fixtures can ALL make&nbsp; a white that looks good on a white wall (just not by slamming all channels to full).&nbsp; The big difference when lighting people is in the spectral content from the fixtures.&nbsp; Color Rendering Index (CRI) is one widely accepted metric for light quality (although not without its flaws), so we&#039;ll use it to compare fixture types.Depending on the exact amber LED type used in the fixture, RGBA fixtures can have better CRI than RGBW fixtures, especially at white points closer to halogen (~3000K).For comparison, at a CCT of ~3000k, an RGB fixture has a CRI in the mid 30s, an RGBW fixture has a CRI in the mid 60s, an RGBA fixture has a CRI in the low 70s, and certain more exotic LED mixes can get you into the mid 80s and above.&nbsp; I haven&#039;t simulated or measured an RGBAW fixture, but I&#039;d expect it to be in the mid 70s.Note, however, that for fixtures with more than 3 channels, there are multiple ways of achieving the same color point, so the exact CRI one gets from the fixture will depend on the skill of the operator, or the sophistication of the color-matching algorithm built into the fixture (if any).</blockquote>

[QUOTE="Rob Timmerman, post: 141501, member: 172"] Re: Chauvet Slim par 64 vs Pro RGBA RGB, RGBA, and RGBW fixtures can ALL make a white that looks good on a white wall (just not by slamming all channels to full). The big difference when lighting people is in the spectral content from the fixtures. Color Rendering Index (CRI) is one widely accepted metric for light quality (although not without its flaws), so we'll use it to compare fixture types. Depending on the exact amber LED type used in the fixture, RGBA fixtures can have better CRI than RGBW fixtures, especially at white points closer to halogen (~3000K). For comparison, at a CCT of ~3000k, an RGB fixture has a CRI in the mid 30s, an RGBW fixture has a CRI in the mid 60s, an RGBA fixture has a CRI in the low 70s, and certain more exotic LED mixes can get you into the mid 80s and above. I haven't simulated or measured an RGBAW fixture, but I'd expect it to be in the mid 70s. Note, however, that for fixtures with more than 3 channels, there are multiple ways of achieving the same color point, so the exact CRI one gets from the fixture will depend on the skill of the operator, or the sophistication of the color-matching algorithm built into the fixture (if any). [/QUOTE]

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