Jinbei photographic lamp *2 has different luminosity. What happened? The camera is d90, so I'll invite an expert.

You don't need to set a camera, but adjust the knob behind the lamp holder to the brightness you need, which can be seen from the brightness of the modeling lamp.

Or is the other light not on? If the receiver is not lit, the photosensitive switch is not turned on. If the power of the two lamps is different, the brightness of the high-power lamp is smaller and the power of the low-power lamp is larger, so as to achieve light balance or adjust the distance. This contrast camera cannot be adjusted.