By heating a glow stick, you can make it brighter. By chilling it, it will last longer (but be dimmer).
Glow sticks work by containing two separate chemicals that are mixed together when the flexible outer container is bent, breaking an inner ampoule.
Inventors thought it would safer than the flare to cordon off highway hazards. But carnival hawkers have made a killing selling them at nighttime events.
When the Christian allows himself to be broken inside, and when he mixes Bible with prayer, the resulting faith emit lights. Heat it up, and it will be brighter. But you need to keep adding the ingredients or it will die down.
The Inventor of Gospel light intended it to save people from the hazards of sin.