Purchase vinyl J Channels ($6 each-Comes in different colors!) from your local hardware store & get enough feet to do your house. *They are easily cut to your any length needed with a utility knife. Drill holes that are just big enough to accept the icicle lights or slightly smaller than the size of your C9 light bulbs. Space holes about 2" apart in bottom of the channel and push each icicle into the holes so they hang downward.
Cindy Wallace