We are currently looking to buy some generators. Today I was talking to a local generator tech, and he was asking me if a +/- 2hz shift in frequency would bother me. I could get an electronic module installed that will keep the frequency shift within +/- 1 hz. I was wondering if the shift of frequency would hurt any of our moving lights or dimmers. He said the voltage will stay the same no matter what, its just the frequency that will fluctuate due to the generator reving up or down based on the load. If it does not matter than i will not get it installed but if it does, than i will. The module runs about 1500 installed.