Rodrigo and the body snatcher pod, the GH should probably be called a grow room. If i removed all the insulation for natural lite the plants would cook to death in the summer and freeze in the winter. As it is now, the temp stays at 75 degrees year round and the RH 80 and the HL's and LL's grow side by side......have heaters for the winter and AC for the summer and the electric bill runs about $40.00 a month. All plants have been in there for over 3 years and have never seen natural lite.....they grow faster than I can cut them back, flower year round and are constantly producing pitchers. I could never afford to heat and cool it as a typical GH without insulation and being a closed environment. An extra benefit, they stay virtually pest and disease free. Hope this answers your questions and thanks for the kind words.
Jerry