Whenever a character gains Force Rating (usually but not always at character creation), they are offered the choice of playing a Darksider.
Darksiders begin as the inverse of the book standard and operate solely upon one key difference: a Darksider freely uses Dark Side Pips and must spend a Destiny point to use Light Side pips on relevant rolls.
In practical terms this gives a minor increase in odds of rolling a Force pip. However to emphasize: all other features of using the Dark Side remain: the use of Dark Side pips generates Conflict as normal, meaning that it is even easier to fall past the 30 Morality threshold. Any character below that Threshold will flip a Light Side Point to Dark Side at the beginning of each session. The standard wound and strain adjustments occur when dropping below the 20 and 10 Morality threshold as stated in Force and Destiny Core.