  We compute explicitly the least degree of generators of almost all symbolic
powers of the defining ideal of Fermat-like configuration of lines in
$\mathbb{P}^3_\mathbb{C}$ and provide efficient bounds for remaining cases. We
will also compute explicitly those numbers for ideal determining the singular
locus of the arrangement of lines given by the pseudoreflection group $A_3$. As
direct applications, we verify Chudnovsky's(-like) Conjecture,
Demailly's(-like) Conjecture and Harbourne-Huneke Containment problem as well
as calculate the Waldschmidt constant and (asymptotic) resurgence number.
