I recently aquired a used 400w Sunlight supply switchable ballast and was wanting to get a MH bulb for it. Home Depot carries them but they have 2 400w MH bulbs and I don't know which one it is that I need. They are the Phillips brand but one is a ED28 which is a smaller bulb and the other is a ED37 which is a bigger bulb.I need someone to let me know which is the correct bulb to use. I don't want to burn down my house by just guessing.On a side note can the same light cord and socket be used for both MH and HPS? I have one from another Sunlight Supply HPS ballast that I would like to use. Any help will be GREATLY appreciated.
Peace,
JD
Peace,
JD