what you have is a dual voltage digital ballast. change power cords to use 220v
why breaker is tripping is ..i dunno. ballast should start both mps and mh conversion bulb. check wattage of hps bulb maybe wrong wattage?
VickiR Reviewed by VickiR on . Need help running HPS/Metal H lamp...No instructions HELP Hello been using cfls and just bought online a Metal H/HPS 400 watt and it said in the online description uses BOTH with a change of cords? Well on recieving it.,Came with both bulbs and only one power cord. The Metal H works fine When i plug in the HPS circuit breaker pops. No switchs except dimmer knob on balast,No instructions,NO other power cord.. My females are in flower mode and OMG excited to give good light IPO cfls Rating: 5