I think its as others have already mentioned the longer days may cause some issues as its not natural for plants from the tropics to have such long days ,
obviously not all , but the odd one perhaps might find the extra long days stressful ...
Its postulated that in their natural setting with the right hours there are less issues with them ...
interesting donald another factor i did not consider ive run sativas on 11/12 but i ran these 12/ 12 i must look into daylight lenghth in that part of the world first time growin thai/laos for me