What gauge of extension cord?

you are probably ok with 14, but if cost isn't a big issue, 12 gauge is always best...

Would I need that heavy of a gauge for that little bit of draw power? < 1 mW?

you are wanting to run as close to the edge as you can?

If that's eight watts per string, and three strings, anything commercially available should be good, right? Twent-four watts is a refrigerator light. That would have to be an led setup.

If it's 8 watt per bulb, we need lots more information.

Thank you for helping me. I do not understand when you say "by the edge"? Just want to know if with that little amount of current that these lights require, do I need a big gauge cord, like 14 or 12 to make sure that the current can get to these being 50 foot out?

Each light is: The package says it uses 5 to 8 watts depending on the outdoor temp. Max Output is: < 1 mW. I am only using 3 of these lights. They are like a solar spot light that shines on your entire house. Got these at QVC

anything less will give you some voltage drop over that distance.

my thoughts on electricity are always better safe than sorry.

a fifty foot 14 ga cord is less than 20 bucks.

why bother with less...?

You are right. I am very dumb when it comes to electrical issues. Are you telling me that I need a heavier gauge cord like 14 to make sure the current can get to the lights and there would be more resistance with a 16 gauge?

Each light is 5 to 8 watts? Whole different ball game, and we don't know how many lights.

Only 3 lights. They each project colored dots over and across your house to make it look like you placed many christmas lights across your house. They come with a stake to place them in the ground and you project the lazer light onto your house.

<1mW is a really minuscule current draw. You shouldn't have any problems with just about any extension cord. BUT don't use an indoor extension cord whatever you do. Spend the bucks as get a 14 gauge 3 conductor outdoor extension cord. It's likely you main problem would be moisture--rain or snow, depending on where you are. Because electricity and water don't play well together, I've seen at Target (and probably just about anywhere else that sells outdoor Xmas lifths), a long extension cord that has sort of a little house on the end, with a stake to pound it into the ground, and a couple outlets in the little enclosure which are protected from the weather. And it's not vbery expensive, better than burning your house down if the moisture should short out the plugs. Look for a GFI circuit too (like you probably have in your bathroom, which will shut off the power if moisture gets into it.