I would like some. My daughter would really like some for her 18th birthday party in a few weeks and she's pecking my head to get them ordered. Will be mains powered as have had some cheapo solar ones before and they weren't much cop. Im after something robust and reliable, to be installed and left out year round. Asking as there are so many sellers these days advertising on social media but when dig a bit deeper they are near enough resellers of low quality products with crap customer service
Al sez this but I don't fully trust AI so thought Id ask on here for recommendations. Need 20 -25m for what it's worth 
I can't recommend anything specifically, but Toolstation and Screwfix always have good range of outdoor lighting.
We got some from a garden centre, can't remember what make but they've been out since September last year and they're still good even thought it's pee'd down for most of that time....
They're plastic rather than glass, so not gonna break easy, but look nice still.
We’ve got https://www.amazon.co.uk/dp/B0D1TNVD5B?ref=ppx_pop_mob_ap_shar e" target="_blank" rel="noopener">these. 30m.
2nd winter with them and they are still going strong. I used them on Friday for the first time in ages. Recommended.
this company sells everything you need to make your own run of lights so quite easy to space the bulbs where you need them
<a href=" removed link " target="_blank" rel="noopener"> removed link
I give up. Search “zyrivon” on Amazon.
I bought some last year from hercules gazebos.
Currently out of stock but can recommend them. Can join 3 sets of lights together if you have a larger area
https://www.hercules-gazebo.co.uk/product/outdoor-ip65-waterproof-gazebo-led-lights-14-4m/
Link above was to www.davidroselighting.com
Look for the beeantee festoon lights they sell.
I've been using the connectable ones from lights4fun for about 8 years - they stay out all year and are pretty good
Bought ours from Lighting Legends 4 years ago and still going strong. On a timer covering courtyard area outside kitchen to provide much needed light for access etc, so used for a couple of hours daily. Replaced around half the bulbs in this time using cheaper replacements from Amazon.
Strung ours up using the steel wire hanging kit to relieve pressure on the lighting wiring.