For all L.E.D. installs you will need to purchase:
a switch and a power management.
You will need to purchase a Power Management.
( acts as a main breaker box for all wires and switch connection,
with a built in fuse)
If you are only lighting up your engine and do not plan on adding any additional lights in the future than purchase
Power Management FOUR.
If you lighting up your whole motorcycle or lighting up your engine now and plan on adding additional lights in the future then purchase Power Management SIX