LED Profile comes in 1m or 2m lengths and is used to house our, which keeps the LED Strip safe and out of the way.
As many lengths of extrusion can be used as is desired. Any 1m or 2m piece can be positioned end to end with each other to make an unlimited distance.
An Endcap is required for each circuit of extrusions being used. It is positioned on the end of the very last extrusion in the circuit and is used to stop dust from and moisture from interfering with the electrical components.
A diffuser is used to give the light a more even blend. Simply purchase the same amount of diffusers as you did with extrusions.