Chauvet Legend 412 Lights Turn on once board has been shut down.

I have 6 Chauvet Legend 412's that have been flown above my two side screens. They are being controlled from an ETC Element lighting console. How do I properly shut the light down prior to turning off the lighting console? Right now, if I shut down the console my fixtures start rotating through each channel; dimming, strobing, changing colors, etc. Any advice would help. Thanks!

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