Thanks man, and here comes the next question :
I looked in every datasheet i could find on the website and i always read that the protection rating of the LED-module's are always safe against pieces with minimum size of 1mm but not against any type of water.
Now my question is, is the reason for not putting a type of protection to the LED-module ( must be a type of case or lense that makes the module waterproof ) because of losing PPF in total?
If yes, would it be that much you would lose for the extra security, if yes how much?
If no, whats the reason for not implementing protection against water? The weight? The extra cost? Or just no need?
I am asking because in my imagination in a greenhouse you have a higher average room humidity than outside or in your living room.