CCT Mixer
Calculate the resulting colour temperature when mixing warm and cool white LED channels. Essential for tunable white systems.
Channels
Output
Quick Scenes
Frequently Asked Questions
What is tunable white lighting?
Tunable white (TW) uses two LED channels — warm (2700K) and cool (6500K) — mixed at different ratios to produce any CCT in between. Used for circadian lighting, hospitality scenes, and healthcare applications.
How do I calculate mixed CCT?
Mixed CCT is calculated using the reciprocal formula: 1/CCT_mix = (ratio_warm/CCT_warm) + (ratio_cool/CCT_cool). This accounts for the non-linear nature of the Kelvin scale. Our calculator handles this automatically.
What CCT is best for offices?
Offices typically use 4000K for a neutral, productive atmosphere. However, circadian lighting systems tune from 2700K (morning/evening) to 5000K (midday) to support natural alertness cycles.
What is Duv in lighting?
Duv measures how far a light source deviates from the black-body curve. Positive Duv appears greenish, negative appears pinkish. High-quality LEDs stay within ±0.003 Duv. Values beyond ±0.006 are visually noticeable.