lamps cutting out

we have several HPL's that are dropping out completely when dimmed below 50 percent. I THINK I have undone any strange dimmer profile that might have been previously assigned. We are using ETC Ion console; perhaps I have overlooked something. It only happens with a few lights. Could this also be a dimmer problem or something electrical?

If you have an etc sensor rack this could easily be a setting in the rack. What kind of dimmers are you using?

got it figured out. The submasters my designer assigned this morning had some left-over effects profiling associated with them from the last show. Thanks for the response though.