Disclosed is a fiber-reinforced composite material that is high in heat resistance and strength while being low in the content of volatile matter that volatilizes during curing. The counterstop is driven by the second mechanism between an operative position wherein it restricts movement of the first mechanism away from a reference position, and an inoperative position wherein it does not restrict movement of the first mechanism away from the reference position. The first capacitor and the third resistor introduce a first zero in the closed loop feedback system. Batteries and a touch sensitive switch are coupled to the light with the touch sensitive switch facing inward.