UV replaced with a U-shaped tube 9w UV lamp electronic and inductance two , electronic and inductor products are not common, electronic lamp on the lamp above the inductor , that light is not lit, parents who need to take note of the time of purchase . Tube length : 16.5cm Electronics and inductance lamp difference: The appearance of the two lamps are the same, no difference, in on light therapy lamp can be manifested. Electronic lamp light therapy lamp : when the machine is powered on , the lamp lights up directly , no flashing process. Inductance lamp phototherapy lights; when the machine is powered on , the lamp will blink several times before stabilizing lights up , the processis somewhat similar to fluorescent us home before use.