Flashlight Turn OFF

There is a code of Flashlight with Battery in Godot 3D that turns ON when you press Left Mouse Button, but turns OFF the moment you release the button.

How do I make it turn OFF, ONLY after pressing the Left Mouse Button again?

extends Node3D

func _input(event: InputEvent) -> void:
    if Input.is_action_pressed("Toggle") and $Battery.value > 0:
        $SpotLight3D.light_energy = 16
    else:
        $SpotLight3D.light_energy = 0

func _physics_process(delta: float) -> void:
    if $SpotLight3D.light_energy == 16:
        $Battery.value -= 0.05

A lot easier if you introduce a state variable, eg light_on and toggle that in the input event. (Changed to the newer is_action_just_pressed). Then toggle the light in input handler for the button, using seperate functions so we can reuse them if the battery is empty.

extends Note3D

var light_on = false

func set_light_on() -> void:
    $SpotLight3D.light_energy = 16

func set_ligt_off() -> void:
    $SpotLight3D.light_energy = 0

func _input(event: InputEvent) -> void:
    if Input.is_action_just_pressed("Toggle"):
        light_on = !light_on
        if light_on:
            set_light_on()
        else:
            set_light_off()

func _physics_process(delta: float) -> void:
    if light_on:
        $Battery.value -= 0.05

        if $Batter.value <= 0:
            light_on = false
            set_light_off()