unable
The rated current of the 30W lamp and the 25W lamp is not the same, can not be used at the same time, in addition, the output current of the 55W ballast is not the same, it is matched with the 55W bulb, each specification of the lamp and ballast are one-to-one corresponding, not the power you imagine is enough to 55W. To light the lamp must have a normal working power and working voltage.