Q: About temperature.

• S. flava
  flower
• Hot
• Cold

A: Different carnivorous plants like different temperatures. However, most do fine with temperatures that do not exceed 38°C (100°F). It may surprise you to learn that if you provide a terrarium with enough lighting, a result is that the terrarium may exceed the temperature range. Then, if the humidity is too low, the plants yellow and crisp, the sundews produce no dew, and in general the plants look terrible.

This may not be an issue with LED lighting, if the heat production from LED light-strips is not very high, like proponents of LED lighting claim.

I recommend covering the terrarium top with a lid, nearly sealing the top but allowing some air circulation, then supporting the fluorescent bulbs a few cm above the glass.

If you are handy with tools, buy a small AC-powered computer fan from electronic stores (for a few dollars, or the equivalent) and modify it to blow across the ballasts of the lights.

I describe all these tricks on my page where I discuss building terraria (see the FAQ library.) Be careful about placing your terrarium near a window. Sunlight striking it can heat it to lethal temperatures very quickly.

Page citations: Rice, B.A. 2006a; personal observation.