keep them coverd at the beginning under led mate ul find ur problems will go away. and no holes mate no. just a juice or milk bottle cut in half. place it over were u put the bean in soil. and gives greenhouse effect. gets all misty under the bottles. good for germination and give them the best start. keeps my beans happy mate.Yeah that makes sense, especially with such a powerful light like yours. I find starting seeds under CFL's seems to work better for me than starting under the LED, I also seem to get issues otherwise.
What about oxygen though, do you have air holes in the covers?