Here is the new GE M-250R2 complete installation. 70 watt HPS, Utility Metals 4 foot bracket, new non cycling GE lamp and a Ripley "Long Life II" photocontrol. Pole ground and connections.
After this connects to your house, where does it go from there? Right to the breaker box? Or to a switch inside? Does the triplex go through the house into the garage?