Explain please? Are you saying you had a headlight that was a higher wattage that designed? All a headlight does is create a short to ground that glows.
A headlight does not create a "short" to ground. That would imply a zero ohm path which would pull max current. A headlight (or any load for that matter) is simply a resistance path which limits the amount of current the device will pull with a given voltage.
In your case you may have a defective headlamp or more likely you have problems in your switch or wiring as others have pointed out.
