Question
Hi
my name is Todor.Is it posible that the veri long lightning like 19.5 h a day and 4.5 night can make orchid strest and yellow loos flowers
Thank you
todor

Answer
Hello Todor,

The simple answer is yes.  The more complicated answer is that it depends upon the type of orchid.  

Simple because orchids like humans need a rest period that they get during the night darkness from exposure to light and warm (hot?) temperatures.  

The complicated answer is that depending upon what type of orchid it is can determine if it needs more or less length of day light hours.  Orchids from the more tropical areas are accustomed to a more even day/night hours while those from more temperate areas are accustomed to longer/shorter day/night differentials depending upon seasons.  

Hope this answered your questions but if you have a question about a certain type of orchid, write back and I'll try to be more specific in my answer.  

Jim Kawasaki
San Jose, Ca.