Being an irrigator before getting into lighting, I naturally used the King connectors on my lighting work as I'd had such great success with them in irrigation. Lately, I'm seeing for myself (and I apologize to those who will rightly say "I told you so") that they have some issues with water intrusion. The picture is of a connection that I repaired (not my install) this week on a system that used the tan/white King connectors and was done pretty much the way I would have done it. This is about 6" into the wire, which was as far back as I could get with the slack I had, and it's still a little green after only a few years in the ground. From what I'm told, the grease in the King connectors melts from the wire heat, which is much more in LVL than irrigation, allowing it to run out of the connector and water to take it's place, which makes perfect sense now that I've heard it. So, what I'm thinking of doing is continuing to use the wire nuts but to put an adhesive lined heat shrink tube over the top of the wire nut and the wire. I like the ease of installation that the wire nuts allow and believe that the extra protection of the heat shrink will keep the grease where it's supposed to be. I may also be switching to a nut filled with a silicone instead of whatever the King connectors use. This is the heat shrink I'm considering - http://www.shop3m.com/80610787808.html. What is everyone else doing to make sure their connections are waterproof? I've also looked at crimp and heat shrink connections, like Lighting Shrink and another 3M product and they're really not any more expensive that what I'm considering but I like being able to just twist and go and having the flexibility to easily redo a splice during installation.