I have linked 5 of these together with no problem.
This is not a tree. That must be a different item. This is a "net" of lights that is best used to put on bushes in front of your house.
Well, it's not Christmas yet so mine are still in storage. I'd have to guess at 1.5 to 2 inches. IMO they are all about the same spacing compared to other brands.
Yes they are outside lights. Just use a strip of electrical tape to cover the outlet to continue adding net lights if you don't add another set.
Laready answered this question.
The label on mine state they are a 61.2 watt rated but does not state the draw.
I strung too many together at first & had to replace the small fuse in the plug. I backed down to 7 sets strung together & it handled it OK this Christmas season.
YES...but you have to put that red tipped bulb in first