Does this occur when the houselights are controlled from the Lumanet wall station, the
console, or both?
With programmed time fades, or when manually fading up or down with a slider?
Are your
stage lights on the same
system/
DMX run, and do they have the same problem?
Are your
houselight DMX cable runs properly daisy-chained (with real
DMX cable) and terminated at the end of the
line?
Just a few questions to help you narrow down the cause.