rename CW LED descriptions to more commonly used CCT

[DedeHai]

this is a suggestion to rename "CW" into "CCT"

@intermittech what do you think? Open for discussion

Summary by CodeRabbit

• Documentation
  • Updated LED type names and color-channel labels for several LED types to clarify RGBCCT support.
  • Clarified wording that appears in the LED types JSON API so displayed names better reflect color-channel capabilities.

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Reviewing files that changed from the base of the PR and between 175d97d and 3519fef.

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• wled00/bus_manager.cpp

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Walkthrough

LED type display names and inline bus-method comments were updated to use CCT-style channel naming (e.g., “RGBCCT”, “GRBCCT”) and some RGB/RGBW descriptors were reformatted across two files.

Changes

LED Type Naming Standardization

Layer / File(s)	Summary
LED Type Name API Update wled00/bus_manager.cpp	BusDigital::getLEDTypes() updated human-readable name strings for multiple LED types, reformatting RGB/RGBW descriptors and renaming CCT-capable variants to use “RGBCCT …”.
Documentation and Comment Labels wled00/bus_wrapper.h	Inline comments and section labels for ESP32/ESP8266 bus methods were updated to reflect CCT channel naming for FW1906, WS2805, SM16825; file now includes a UTF-8 BOM on #pragma once.

🎯 2 (Simple) | ⏱️ ~10 minutes

Suggested labels: enhancement

Suggested reviewers:

• softhack007

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately summarizes the main change: renaming CW (Cold White) to CCT (Correlated Color Temperature) in LED type descriptions, which is the primary focus of both modified files.
Docstring Coverage	✅ Passed	Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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[intermittech]

Oh, I am 100% for that!

Any term other than RGBCCT or RGB+CCT is confusing in my opinion. WW is generally used for "Warm White" and CW is often used for "Cold White", that's fine. Things we're okay up until RGBW but then people starting calling it RGBWW or RGBCW sometimes, denoting the particular color temperature of that strip but there things went wrong, sometimes using RGBCW as referring to dual white also since the C and W is in there, very confusing. I've also seen it written as RGBWWCW, less confusing but still a bit meh in my opinion.

CCT is clear what it means, dual white color temperature
RGBCCT is also clear what it means, R+G+B with dual white

RGBW stays as is, R+G+B with a single white (whatever temperature)

I sometimes use the distinction of RGBCCT and RGB+CCT if the white is integrated into the same package, or external, but for the software side, that really doesn't matter, CCT and RGBCCT is the correct way to do it in my opinion.

[softhack007]

(Minor) this entry uses "RGBCCT" as prefix to the chip name, but the other entries have that as postfix (after the chip name). Was this intended?

[DedeHai]

yes, as it applies to multiple strips, could also add this to the others that are frequently used, i.e.

• RGB WS281x
• RGB 400kHz
• RGBW SK6812/WS2814
• RGBW UCS8904
• RGBCCT WS2805 (note: uses slightly faster timing)
• RGBCCT SM16825

etc.

[softhack007]

Makes sense for me 👍
Same as @intermittech says, I remember there were different namings around when RGB strips got white as an extra LED. CCT seems to be the term that "survived".

To be discussed: maybe we could always use the RGB+" naming?

• RGB (no white)
• RGB+W (single white - either cold or warm white)
• RGB+CCT (both warm and cold white)
• White (single white)
• CCT (cold+warm)

Not sure what to do with "CCT + Amber" strips that have three white channels?

[intermittech]

Oh that is a good one @softhack007, there is a SK6812 WWA which has Warm, Cold and Amber White, I'd say it's so much of an exception (and the only one of that sort as far as I am aware) that it shouldn't define the naming for the rest. So maybe we just keep it as an exception to the rule, I think that's fine.

It seems the PWM naming was done by another developer and that it's 5 channel mode is called RGB+CCT, maybe just clean it all up and make it the same and I'd personally choose for RGBCCT then.