Tank is tripping breaker....

[phi delt reefer]

swap to electronic ballasts - as you stated they are magnetic ballasts. discontinued icecap ones are pretty cheap - same for the vertex ones (identical ballasts - different cases)

have the halides come on like this

early morning - left light comes on
mid morning - second left comes on
lunch - both centre lights on and left one off
afternoon, both right lights on, 2nd left off
evening only left one on

I think Asmodeus does this as well.