Bright Wizards use the special mechanic called Combustion. Combustion points begin at zero, and most spells that you cast add a certain amount Combustion points to your Combustion pool. Unlike some other classes, Bright Wizards do not "spend" their special mechanic points. Instead, the amount of Combustion you have affects the damage and critical effect chance of your spells. On the downside, it also causes Explosion damage to the Bright Wizard, better known as backlash damage. At 100 Combustion points, it is very easy for a Bright Wizard to accidentally kill themselves Explosion damage.
Combustion Chart
1-10 Pts: +4% Critical Chance; +10% Critical Damage; 4% Explosion Chance
11-30 Pts: +8% Critical Chance; +20% Critical Damage; 8% Explosion Chance
31-70 Pts: +15% Critical Chance; +40% Critical Damage; 15% Explosion Chance
71-90 Pts: +25% Critical Chance; +80% Critical Damage; 25% Explosion Chance
91-100 Pts: +35% Critical Chance; +100% Critical Damage; 35% Explosion Chance