Most modern handguns have an accessory rail and many companies offer high-output lights that can be attached to these rails. Some even have an integrated laser. Others, such as the Crimson Trace Light Guard, don't even need a rail; they can be attached to the trigger guard. Most are moderately easy to activate while maintaining a normal two-hand grip. Having the light attached directly to your handgun frees up your support hand to open doors, conduct reloads, call 911 or pick your nose. So, a weapon light is a good idea. Right?