I have installed 8 of these now in Warm White. They are paired in strings up to just under 10M (33 feet). These strings are installed under the nosing of stair treads around the edge of a large deck. I routed the 2x6 nosing prior to installation to provide a place to conceal the strips. the strips can be cut to length every few inches. To link the strips, I carefully cut off the silicon covering a few mm to solder leads to the second string of LEDs. You need to connect positive to positive / negative to negative to link the strings. When in doubt, try a test connection by hand with the system powered up. Its 12v. That is safe to do. Then using a fine tip hot iron, I coated the tip in melted solder prior to touching the strip and lead wire with it. Do it relatively quickly. Do not leave the iron in place to transfer heat to the other components. When all is finished, waterproof the connections with something. I used two coats of "Liquid Electrical Tape". Great stuff.The adhesive on the back of these was sufficient to hold these in place on smoothly cut and stained wood while I installed them, but I used clips every 12 inches or so to secure them permanently.My one comment is that the "Warm White" seemed still a little too bright at first. These are also a lot brighter than the old LED rope light I replaced. I knew they would be, but it was still a bigger difference than I expected. It is pretty dramatic, and after a few months, I really like it.