My knowledge of this is very basic, so I would really appreciate it if I can get some help. I am trying to connect 3 LED strips around a room in crown molding. The strips are 3528 LEDs, 12V DC, 1.5 Watts/foot, and are 16 feet each. I figured that to connect all 4 in a series I needed a power supply that is around 70-80 Watts, so I bought a 120 Watts, 10 Amp, 12V DC to AC adapter. When I connected the series, the last 2 strips were very dim, I am guessing because of voltage drop. I have never connected in parallel before but I am guessing that is what I need to do.
My questions are, what kind of wire do I need to run if my room is around 48 feet in perimeter? And will running it in parallel help with the dim at the end? And finally do I need to get a different power supply if I change it?
Thanks a lot!