I ordered two boxes of 50 cm/19 ⅝" (the longer version) warm white LED meteor lights. The company sent the wrong color but they both work fine. However, the wires are not really meant for cold weather, as they snap easily when they become rigid from the cold outdoor temps, or when dangling while hanging them. If the tubes are dropped while hanging the attached ones wire will snap off from their weight and gravity, and even easier if done while hanging outdoors while it's cold out. They can survive, providing its not windy and cold outside, otherwise the thin flexible plastic coating will snap and the fine wiring will bend and break. Making the product very delicate.
I've used these types of meteor lights for about 15 years on my 20' wide balcony (takes two sets) in front of my home, even during subzero temperatures, nearing -30℉ sometimes for a week or two during our coldest part of our winter season in December (sometimes) but normally in January and February it typically gets super cold into the subzero temps for at least a week. Like I said, they can survive the cold, but under certain conditions due to the delicate coating and wiring, and if the ends are hot glued with a glue gun. By my photos provided you can see the hot glue on the very bottom of the tubes. The northern states of the US including Alaska should consider this aspect. It would be nice if the manufacturer used a thicker plastic coating on the wires and made more weatherproof.
Again, I would recommend using a hot glue gun on either end of the tubes and where the ends meet other connections, whether it's at the plug-in or adding on a new string of meteor lights to another set. I have two sets connected and they were stapled onto my wood balcony bannister with a heavy duty stapler and staples (not that this is needed, js). I've had warm white, now this bright white light type, blue, as well as red. I would prefer there not be a transformer box on the one end, as that just gets in the way and another part that has to be hot glued with a glue gun. The hot glue gun is so no condensation or water gets past their sealed ends of the tubes, as they are not very water-resistant are definitely not waterproof. They will fill up full of water and short out and not be useable anymore.
I hung mine early before the cold season begins, while the plastic coating is pliable/flexible. I have also added on an outdoor remote plug-in so I can use a remote control to turn them on and off. These are really worth, at most, maybe $15 a box, as to their quality and the discrepancies mentioned. Also, the US plug, it's much less lighter in weight than a lamp's electric cord and prongs are made of a really weak metal. You may want to duct tape that to wherever you're plugging it in at so it stays plugged in. It will fall out of the receptacle, even if bended to tighten. Just be careful with how/where you're duct taping the plug to an electrical outlet. The lights stay cool but still, safety first.