12

Requires:

{
  "canShineCharge": {
    "usedTiles": 28,
    "openEnd": 0
  }
}
"canChainTemporaryBlue"

Exit condition:

{
  "leaveWithTemporaryBlue": {
    "direction": "right"
  }
}

Dev note: A couple more tiles can be used if power is on, but this doesn't seem worth modeling.