Here's the situation: I have a 90 gal. fish tank that I have turned into a terrerium. In that terrerium I have a small pot of butterworts (3 inch), some sundews and two lowland nepenthes. I think the humidity is right because the nepenthes are now producing pitchers (albiet slowly) and the sundews are producing dew, but they aren't turning pink. I'd like to put a light in the tank closer to the sundews to help them turn, but I'm not sure what wattage, or how close to put it to the sundews. I'm also concerned about the temperature of the tank after I put a light inside it and put the lid on.. If I put the light inside should I leave the lid off? Any input would be much appreciated - Thanks!