Both of the other answers are right but incomplete.
Listiow had loaned Lirin the spheres to provide light for surgery. Lirin was present at the brightlord's death, and came away with a will giving the spheres to Lirin to finance Kaladin's education as a surgeon.
It did turn out Lirin lied about it. He claimed Wistiow would have wanted this, but passed without regaining lucidity.
This claim on the spheres of course led to the friction between the new brightlord Roshone and Lirin, eventually to Tien being drafted and Kaladin joining the army.
