LED Strip Lights
I have bought many 5m (16.4') strip lights from "Banggood.com" with decent results and very good prices. They are, of course, Chinese, but they have worked well for me. Most 12V strips are 5m, or 16'-3". I used one of these (white light) to install under my long outside awning and wired into my porch light switch. Easy. It looks terrific. A 2-wire strip will be one colour. A 4-wire strip will be RGB or RGB-W, and will have a controller. The controller has a remote so you can have almost any colour you want and have the colours fade in and out.
I bought several RGB strips (10) for my outside Christmas lights on my (stick built) home, mounted on 20' long aluminum strips that I leave up year round and light them up in whatever colour I want for a specific holiday. Red for Canada Day, for example, Green, Red, and Blue at Christmas (one colour at a time) and Orange for Halloween.
I cut about off 4' of a strip and soldered it to a standard 5m strip to get my 20' length to attach to the aluminum strips. The 20' length is just a bit too long the for power supply (1.5A x 120V) as the last 3-4' of the strip is not quite as bright as the first 10-15'. It might be OK if you wire it directly to a 12V supply such as your porch light.
Another website that has these strips at very reasonable prices is "AliExpress.com", but you need to wait a little for delivery. I just ordered some Meteor LED lights from them and delivery is 35-60 days (coming from China). I don't know the quality of the product from Amazon or ledsuperbright.com. I could be, and likely is, superior to Bangood.com or AliExpress.com, but the cost is so much more.
Just sayin'. This has been my experience and it has worked out very well.
2018 Denali 3500 SRW