The invention discloses a luminous analyzing device, which is characterized by the following: reducing variant of current value through shortening switching circuit gap; decreasing energy transmittingefficiency through increasing consumption of optical element of driving circuit; connecting igniting circuit to discharging gap to parallel multiple combinations of coil and driving circuit, whereinthe driving circuit possesses the following two conditions: exerting fixing potential difference on the coil to increase current; connecting coil to discharging path to last current through coil; staggering increased current condition timely.