08/07/12 at 01:22I guess I answered it for myself... I found a nice chart in one of AEL catalogs titled "HPS Servicing Guide".
35watt: New lamp voltage range: 46-62volts End of life: 84volts Amps: .83
50watt: New lamp voltage range: 46-60volts End of life: 84volts Amps: 1.18
So I think anything rated for 120volt 15amp should be fine!