What is the flash of the dimmer
Dimmers, leds rate is too small, not enough to make the device to work properly, leading to a turn on one of the frequency of the reward of the problem, it is recommended to add dummy load circuit, there will be improved, but cannot completely solve. FYI
Lies mainly in drive technology, because front move light adapted to the impedance load and inductive load, after the dimming can be applied to capacitive load will have better, of course, that move light with you in a few more dimmer will also play a role, because the dimmers international and there is no unified standard conduction Angle parameters, are sometimes kept in dimmers some dimmers for the driver will be better. A good design technique also allows for most adjustment.
The frequency flash is related to your modulation drive. Is there a flash in the low voltage?