Two-wire tunable white runs warm and cool on one pair of conductors, so the strip drops into a standard two-core feed and a controller that shifts the mix. It is the simpler route for hospitality schemes that only need a temperature slider.
Three-wire layouts keep the channels separate, which suits controllers that dim each channel independently or need to hold one channel at zero. Both are listed at 7 + 7 W/m and 6 + 6 W/m depending on density.
Cut intervals differ by density — 19.23 mm, 25 mm, 26.31 mm and 41.66 mm in the current range — so set the run length against the interval before ordering.
Related series
Tunable white