Sorry, but no. You can shoot people for simple vandalism after dark as well.
Texas Penal Code, Chapter 9, subsection 41 and 42 - also known as 9.41 and 9.42.
§ 9.41. PROTECTION OF ONE'S OWN PROPERTY. (a) A person
in lawful possession of land or tangible, movable property is
justified in using force against another when and to the degree the
actor reasonably believes the force is immediately necessary to
prevent or terminate the other's trespass on the land or unlawful
interference with the property.
(b) A person unlawfully dispossessed of land or tangible,
movable property by another is justified in using force against the
other when and to the degree the actor reasonably believes the force
is immediately necessary to reenter the land or recover the
property if the actor uses the force immediately or in fresh pursuit
after the dispossession and:
(1) the actor reasonably believes the other had no
claim of right when he dispossessed the actor; or
(2) the other accomplished the dispossession by using
force, threat, or fraud against the actor.
§ 9.42. DEADLY FORCE TO PROTECT PROPERTY. A person is
justified in using deadly force against another to protect land or
tangible, movable property:
(1) if he would be justified in using force against the
other under Section 9.41; and
(2) when and to the degree he reasonably believes the
deadly force is immediately necessary:
(A) to prevent the other's imminent commission of
arson, burglary, robbery, aggravated robbery, theft during the
nighttime, or criminal mischief during the nighttime; or
(B) to prevent the other who is fleeing
immediately after committing burglary, robbery, aggravated
robbery, or theft during the nighttime from escaping with the
property; and
(3) he reasonably believes that:
(A) the land or property cannot be protected or
recovered by any other means; or
(B) the use of force other than deadly force to
protect or recover the land or property would expose the actor or
another to a substantial risk of death or serious bodily injury.
Texas law on self defense is even clearer - though 9.41 and 9.42 provides all the justification needed in this case. 9.31 and 9.32 cover self-defense when property is not involved:
§ 9.31. SELF-DEFENSE. (a) Except as provided in
Subsection (b), a person is justified in using force against
another when and to the degree he reasonably believes the force is
immediately necessary to protect himself against the other's use or
attempted use of unlawful force.
(b) The use of force against another is not justified:
(1) in response to verbal provocation alone;
(2) to resist an arrest or search that the actor knows
is being made by a peace officer, or by a person acting in a peace
officer's presence and at his direction, even though the arrest or
search is unlawful, unless the resistance is justified under
Subsection (c);
(3) if the actor consented to the exact force used or
attempted by the other;
(4) if the actor provoked the other's use or attempted
use of unlawful force, unless:
(A) the actor abandons the encounter, or clearly
communicates to the other his intent to do so reasonably believing
he cannot safely abandon the encounter; and
(B) the other nevertheless continues or attempts
to use unlawful force against the actor; or
(5) if the actor sought an explanation from or
discussion with the other person concerning the actor's differences
with the other person while the actor was:
(A) carrying a weapon in violation of Section
46.02; or
(B) possessing or transporting a weapon in
violation of Section 46.05.
(c) The use of force to resist an arrest or search is
justified:
(1) if, before the actor offers any resistance, the
peace officer (or person acting at his direction) uses or attempts
to use greater force than necessary to make the arrest or search;
and
(2) when and to the degree the actor reasonably
believes the force is immediately necessary to protect himself
against the peace officer's (or other person's) use or attempted use
of greater force than necessary.
(d) The use of deadly force is not justified under this
subchapter except as provided in Sections 9.32, 9.33, and 9.34.
§ 9.32. DEADLY FORCE IN DEFENSE OF PERSON. (a) A
person is justified in using deadly force against another:
(1) if he would be justified in using force against the
other under Section 9.31;
(2) if a reasonable person in the actor's situation
would not have retreated; and
(3) when and to the degree he reasonably believes the
deadly force is immediately necessary:
(A) to protect himself against the other's use or
attempted use of unlawful deadly force; or
(B) to prevent the other's imminent commission of
aggravated kidnapping, murder, sexual assault, aggravated sexual
assault, robbery, or aggravated robbery.
(b) The requirement imposed by Subsection (a)(2) does not
apply to an actor who uses force against a person who is at the time
of the use of force committing an offense of unlawful entry in the
habitation of the actor.