Can the lights withstand the elements?
Vibe Pixie String Lights were great on a recent camping trip. John Carlsen/CNET
As outdoor lights, the hardware should be well-suited to handle the weather conditions outside. However, the range of which the string lights will play a factor in whether they can work where you live or not. Water- and dust-resistance ratings of IP65, IP67 or IP68 would be best, but IPX4 could work also. The first three will handle wet and dusty conditions better than the IPX4 as it is only rated for some light moisture.
The other weather factor to consider is the temperature ranges. If you live in an area that gets to experience all four seasons, then you need to ensure the lights you buy can withstand the changes from freezing winters to blazing hot summers. But if you don't plan to keep the lights up during the more extreme times, then your lights will have fewer hurdles to contend with.
Bulb and light style
Like most other light bulbs, outdoor sting lights coming various bulb types and styles. Many of the modern outdoor string lights offer LED lighting sources as it increases longevity, reduces energy requirements and can be much brighter. These lights also don't produce near the heat of the more traditional incandescent bulbs. LED bulbs can also provide a seemingly unlimited range of colors.
LEDs can also excel in the range of bulb styles available since the light source is so small, it can be fit inside any size or shape of enclosure. Incandescent bulbs have a wide range of styles, but can be limited in bulb sizes. This is because the smaller the bulb, the smaller the filament inside, and less filament means less light. And LEDs have become warmer and more like their charming incandescent cousins over time.
One last note: Our picks are mostly larger, brighter bulbs made for durable all-year outside work. That's noticeably different from the tiny, twinkly lights some people have in mind for enchanting backyard get-togethers. If you're more interested in those kinds of lights, visit our recommends for smart holiday lights instead.
Length of the light strand
Outdoor string lights, like these from Nanoleaf, are a great way to have flexible lighting options for your outdoor spaces. Chris Wedel/CNET
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