These hook directly to your 12v battery. No additional power supply/relays needed.
Set includes one pair. People commonly mount one under each side of the gas tank to light up their engine.
Here we have a pair of blue led strip set for your motorcycle. The strips are each one foot long, waterproof, flexible and have about 10" of positive and negative wire soldered to the end of each strip and protected with heat shrink tubes. Double sided tape is attached to the bottoms but it is recommended that you add a little extra adhesive for a more permanent hold. I also have these in various lengths and colors. You can trim these down shorter (every 3 leds) if desired. Feel free to ask me any questions.