I have a 200 volt grow light, it has 2 horizontal plugs and a third normal one. I want to know my options for pluging it in? I can't find any adapters that will work for it in my house. Im kind of new at this and I don't know if this is the place to post... Thanx.

It can be wirenutted together in a Electrical Box, with proper connectors and cover, The current(Amps/Watts) is important, you may need bigger wires and a bigger breaker.