Uk websites emphasise a significant drop in temp overnight, but they seem to give fairly different temp ranges. One gives the range of about 18-24°c during the day, and 13-17°c at night. Another one says that they are very resilient and can stand temperatures in the summer of up to 35° (95f). I really want to try them, but haven't yet - I just aspire to! perhaps someone else who has a bit more experience than me will chime in.
Can we see a photo?