Seems I have been hijacked into doing some lighted arches and some other things i guess. Looks to me that a digital 120vac output 8 channel 2amp relay card will work. Has anyone else done it this way, and if you did, what type of timing did you use between channels? I normally do industrial controls, but some insight on timing or other issues would be helpful. Need be I have an additonal 16 channel,. Looks like there are many variations of moving the lights up/down, center to both ends, etc. I am not beyond copying a working program or any additonal idea's. I could also make 3 arches move together as a 2 amp channel will do the light sets in sync (should work). We are new to this type of thing and time is moving quickly by. Do most people us PLC's or something else?