Kalanchoe in winter

Hello
I've a couple of Kalanchoe, is it ok to keep them on a kitchen window, though it can be quite cold at night.. or should they be kept in the living room where its warmer, but there's less light.
thanks
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How cold? Those big, fleshy, water-laden leaves can't take very cold temps. I think the lowest temp recommended for them is 55F although it didn't give an exact temp here:
http://www.garden-services.com/kalancho.html
"Kalanchoes are succulent, and as such, can tolerate warm, dry conditions commonly found indoors during the winter. Flower colors range from red to orange to yellow. Plants prefer a bright, sunny location. Cool evening conditions during bloom will make flowers last longer. When done blooming, cut the plants back by one-fourth to one-half and re-pot in a slightly larger pot. Soil should be extremely well-drained; the addition of sand, vermiculite or perlite in equal parts to a packaged houseplant soil mix is recommended.
Plants can be placed outdoors in partial shade. Allow the soil to dry before watering. Fertilize every two to three weeks. Pinch plants to keep compact.
Like chrysanthemums and poinsettias, kalanchoes are short-day plants and bloom when nights are long. Avoid placing plants under artificial lights during the evening.
Plants seldom do well after their second blooming. Rooted cuttings can be taken to encourage new plant production."
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