String of mason jar outside lights

I saw a post where someone used a string of christmas lights the old type with screw in bulbs. They drilled holes in the covers & attached the lights. I did this but the jars fill up with water when it rains. I tryed using hose washers but now the bulbs don't screw in all the way. I didn't make the holes to big. What did I do wrong ? I can't find the post
  6 answers
Your comment...