What is the maximum length I can run on a dimmer?

Dimmer capacity is measured by total amperage not length. LiteDimmer Single can run an entire 5m roll of VHO Literibbon. That’s 8A max. A 5m roll of VHO Pro is roughly 8A, so in theory you could have 1- 5m rolls powering off of 1 LiteDimmer Single.