I'd use one 400/430.. better yield from the stronger light, less wiring, hangers..basically an easier choice.. IMO
google this..
Philips son agro 430.. they have 54,000lumen, 30% more blue spec. so its good for veg...
Luck.
The HPS lights HD sells are not rigged to grow well, they are made to put above a drive way for flooding it with light, they can easily run a fire risk if set up improperly inside.