Interesting finding!maybe I'll do some experiment in the future.Thanks for sharing.
but one question,won't the florescent tubes light heat up your tank?cos recently the temperature in Malaysia gone quite high,around 32-35 C at day time (at least at my place), so the temparature in the tank will be higher after you switch on the florescent tubes light,right?just wonder will the high temp kill the plant although the humidity is high?