In the wild amp are found to grow at 2,600 feet ( so far the highest elevation i came across ) with night temp around 23°C and humidity around 90%. Any conditions below to be cautious. check and monitor their growth.
How easy or difficult to obtain a near tropical conds in cold country i do not know in relation to the cost of lighting and heating up. On the opposite - me (and many lowland tropical growers) face with the problem of providing cool conds for highlanders