2 power supplies 1 ac line so simple like wiring a speaker lol ran line and ran parallel still no go led flickers however if i disconnect one of 2 neg wires from ballest and add it to other ballest neg wires light stops flicking and runs at half brightness then if i also connect the second power supplies neg wire to the other three viollah all bright no flicker all exited however if left together 4 negs light will start again without flickering im at aloss folks not a clue im fairly new to electricity all together is there something im missing or just bunk system would love to know appreciate any help and thank you