They ruled jointly, until Albert died in 1626 and Louis Henry became the sole ruler.

Policies were mainly drawn up and carried out by his councillor, the publicist and professor Philipp Heinrich Hoen (Hoenosius).

Hoen also administered the county during Henry Louis long periods of absence.

He also represented the interests of the House of Nassau and the Wetterau Association of Imperial Counts in the negotiations that led to the Peace of Westphalia.

He served the emperor as a senior officer and united his forces with those of Landgrave George II of Hesse-Darmstadt.

After Hoen died in 1649, Louis Henry tried to enforce an absolutist policy in Dillenburg.

He also attempted to support Herborn Academy, which had been badly affected by the war, but eventually lost interest.

Since his eldest son, George Louis had already died in 1656, Dillenburg was inherited by his grandson Henry.