Converting a standard HPS to a MH/HPS Switchable for less than $8.00

[WillysWonder]

Does this mean that if you use a 400W MH ballast and add an ignitor (HQI style) it would fire a 400W HPS? I often have wondered about this...

[djsethall]

4x5 Take pics of the setup. Maybe a part # and manufacturer of the capacitor would help. It might have an internal ignitor inside the capacitor. Which would be harder to convert. But could be done.

WillysWonder

Thats the theory. I will be attempting this for my 1000 watt Sunlight Supply Ballasts. Once I have succesfully done this, I will post pics. I do know that there is a difference between MH ballasts and HPS ballasts. I'll give it a shot and let you know how it goes, if the actual ballast coil can handle it then it should work. I know that MH has a higher startup voltage than HPS so it should be able to handle the load. A MH bulb has the ignitor in the bulb whereas the HPS doesn't. Cross yer fingers on this one. Once it is done I'll start a thread on convertin your MH ballast to a switchable.

[WillysWonder]

cool. I will keep my eyes open for it...