My dear Al-Styles ...... sunlight is not very natural everywhere in the world........ they have done a lot of outdoor shooting (for JC's ) and you have not seen any sunlight there neither.
And you have heard the contestants say over and over again that they are happy to come out in open because where they live they could not even see the sky properly....there were only trees above them.
And the climate...cool without sunlight is the main reason why IJSMB has been shot in Malaysia jungles and not india.
I agree with Akash completely here.