What colour temperature should I use in a living room?

Most people land around 2200–2700K for relaxed evenings and 3000–4000K for general living. Cooler temperatures (5000K+) suit task areas like workbenches and kitchens. The point of tunable white is that you don't have to choose once — set warm evenings and cooler days with an automation.

How do I control a CCT LED strip with Home Assistant?

Use an analog PWM controller running ESPHome with a cwww light: two PWM outputs (warm + cool) become one Home Assistant light entity with a native colour-temperature slider and smooth transitions. On the QuinLED An-Penta line this is a few lines of YAML, fully local, no cloud.

CCT / Tunable White LED Strips — the Practical Guide

Q: What is a CCT or tunable white LED strip?

A CCT (correlated colour temperature) strip carries two kinds of white LED — warm white and cool white — on separate channels. A controller blends the two, so one strip can be anything from a candle-warm ~2200K to a daylight-cool ~6500K, adjustable at any moment. It's also called tunable white, WW/CW, or CW/WW.

What the Kelvin numbers mean

Colour temperature describes where a white sits between amber-warm and blue-cool, in kelvin. Lower is warmer. In a real home:

2200K	Candle / sunset warm. Unwinding in the evening, coves, bedrooms.
2700K	Classic incandescent. The "cosy bulb" most people grew up with.
3000–3500K	Soft white. Comfortable general living light.
4000–4500K	Neutral. Kitchens, bathrooms, workbenches — alert but not clinical.
5000–6500K	Daylight. Task work, true-colour checking, video sets.

The trouble with fixed-white strips is that the right answer changes through the day. The light you want at 9 in the morning is not the light you want at 11 at night. Tunable white means you stop choosing.

How a CCT strip actually works

A CCT strip alternates two LED types along its length — warm white (typically ~2200–2700K) and cool white (~6000–6500K) — wired as two separate channels sharing a positive. The controller dims each channel independently: full warm at bedtime, an even mix for neutral, full cool for task work. The blend happens in light, on the strip — smoothly, with no pixels or data lines involved.

Try it — this is the exact behaviour, two channels blending:

Tunable white, live.

Drag to mix warm and cool — two analog channels (WW + CW) blended by the controller.

3000K Warm white

2200K warm4000K neutral6500K daylight

Why analog strips do white better

Addressable (pixel) strips are wonderful for colour and motion — that's what QuinLED's Dig-Next line is for. But for white light you live and film under, analog wins on the things that matter:

Colour quality. Analog white and COB strips routinely reach CRI 95+ — skin tones, wood and food look right. Addressable whites typically can't match it.
Brightness. Analog strips deliver far more output per metre, and a proper controller feeds them real current — up to 10A per channel and 30A total on the bigger An-Penta boards.
Simplicity. Two channels, no data signal, no pixel chips to fail. A CCT zone is just warm + cool wires into two fused outputs.

The one thing to insist on is dimming quality: a slow PWM controller will make any strip band on camera and feel harsh at the low end. The An-Penta line dims at ~20 kHz with 12-bit resolution, so the blend stays smooth from full daylight to a barely-glowing 2200K.

The ESPHome config (this is the whole trick)

ESPHome's cwww light platform turns two PWM outputs into one proper tunable-white light. Here it is for an An-Penta-Mini using its two 5A channels — the pins below are the Mini's; other boards differ only in pin numbers (see your board's guide):

# Two PWM outputs: warm white + cool white (An-Penta-Mini, L1 + L2)
output:
  - { platform: ledc, pin: GPIO3, frequency: 20000 Hz, id: ww }  # L1 · 5A
  - { platform: ledc, pin: GPIO0, frequency: 20000 Hz, id: cw }  # L2 · 5A

# One tunable-white light entity for Home Assistant
light:
  - platform: cwww
    name: "Living Room Cove"
    cold_white: cw
    warm_white: ww
    cold_white_color_temperature: 6500 K
    warm_white_color_temperature: 2200 K

Flash that and Home Assistant shows one light with a native colour-temperature slider, smooth transitions and full automation support — sunset warmth, morning daylight, movie-night dim — all over the local API, no cloud anywhere. Prefer no Home Assistant at all? WLED runs CCT standalone from your phone (v0.15-b3+ for analog).

Which board for tunable white?

A CCT zone needs two channels. One zone: the Mini (its two 5A channels are made for exactly this — and it still has three channels spare). A big, bright cove or several rooms: the Plus, with 10A per channel. Many independent CCT or RGBCCT zones: the Deca runs up to seven dual-white zones or three full RGBCCT strips from one board. Full comparison →

The practical takeaway: buy a dual-white (CCT) strip instead of a fixed white, give it two fused channels on an An-Penta, and let ESPHome blend them. It's the single biggest everyday upgrade analog lighting offers — light that matches the time of day, at CRI your camera and your eyes will both thank you for.

Common questions

What is a CCT or tunable white LED strip?

A strip with two whites — warm and cool — on separate channels. The controller blends them, so one strip covers ~2200K to ~6500K, adjustable any time. Also sold as "tunable white", "WW/CW" or "dual white".

What colour temperature for a living room?

Typically 2200–2700K for evenings, 3000–4000K for general living. But that's the point of tunable white: automate it — warm after sunset, neutral by day — instead of picking one number forever.

Can RGBCCT strips do this too?

Yes — RGBCCT is the same warm + cool pair with RGB alongside, on five channels. You get the full tunable-white range and colour when you want it. One RGBCCT strip fits a Mini exactly; the Deca runs three of them independently.

Does blending two whites cost brightness?

At the extremes you're mostly driving one of the two channels, so a CCT strip's maximum output at 2200K or 6500K is roughly half its mid-blend total. In practice: size the strip generously, and remember the An-Penta has the current headroom to drive dense, bright dual-white strips properly.

Written by Quindor, designer of the An-Penta line · ESPHome config from the official An-Penta-Mini guide · Full hardware docs at quinled.info

CCT / tunable white, explained.