Choosing outdoor Christmas lights for a house

The lighting aisle is organized by packaging, not by job. That is why it is confusing: a box of C9 and a box of mini string sit next to each other with similar photos, and nothing on either tells you that they are for different parts of the house.

Here is the useful division. Roofline wants bulbs that read individually at distance — C9 or C7. Shrubs and hedges want net lights, because wrapping a bush by hand is twenty minutes you will not get back. Eaves and gutters can take icicles, which are the most forgiving format to install. Wreaths, mailboxes and anything on a door want battery. The far end of the yard, with no outlet wants solar. Most houses use three of those five.

Bulb sizes, plainly

If you want one recommendation: C9 on the roofline, nets on the bushes. That combination is what most well-finished residential displays actually are, and each piece takes the minimum possible time for the result. Our best outdoor Christmas lights page covers the whole range, and best C9 goes deeper on the roofline pick.

LED versus incandescent is already decided

You will still find incandescent sets on shelves, and there is one good reason to want them — the color of a hot filament is genuinely different from an LED's, and some people can see it. Everything else favors LED: a fraction of the power draw, which is what lets you run a whole house on one circuit, and no hot glass to melt the snow off itself.

The power difference is not marginal. It is the reason a modern display of 1,500 bulbs runs on a single 15-amp circuit when the same display in incandescent would need three. The full arithmetic is in LED vs incandescent and cost to run Christmas lights.

Build quality is about sockets, not brightness

The single specification that predicts how long a set of lights lasts is whether the bulbs come out. A socketed C9 set with E17 bulbs is repairable: one dead bulb is a two-dollar fix. A molded mini string is not: one dead section is a dead set.

That is the real difference between commercial-grade and consumer lights, and it matters more than lumens or a rated-hours figure. Commercial vs consumer grade works through what you are actually buying, and replacing bulbs and fuses covers the repair itself.

Weather is the thing that ends sets

Outdoor-rated does not mean submersible. The wire and the bulbs are fine in rain; the failure point is the connection between two sets, and the one lying in a gutter full of standing water. Are outdoor Christmas lights waterproof covers what the ratings actually promise and where to put the connectors.

Once you have chosen the lights, the next question is how to attach them — which is clips and mounting, and it is a bigger decision than most people expect. Before that, if you have not yet worked out how many sets you need, start at planning.