Yes, it's great, and:
" Thus, LFT (Leaf freezing tolerance) of both cultivars (assessed as LT50) increased after CA by at least 1.9 °C, which was obtained by the end of the 10/5 °C (day/night) step of the CA regime with no further gain in freezing tolerance achieved after 7/3 °C (day/night) exposure for an additional week (data not shown)."
So 10º/5º C (day/night) would be enought for a cold acclimation in the end (they did it for 3 weeks "Plants were exposed to a stepwise lowering of temperatures in the growth chamber as follows: 18/12 °C (day/night) for 1 week, then 15/9 °C (day/night) for 1 week, then 10/5 °C (day/night) for 1 week, and finally 7/3 °C (day/night) for 1 week. ")