Mh conversion bulb same as mh bulb?

[The Germinator]

My 400 watt lighting system uses an hps bulb at the moment. The manual says it can use a mh conversion bulb. When I look online not all mh bulbs say conversion. Does it have to say conversion or will any 400 watt mh bulb work? Provided of course that its has the right base. Ty

 

[The Germinator]

Sorry guys. Guess it was a dumb question.

 

[The Germinator]

Buying the bulb. Will let you know

 

[The Germinator]

It's not the same.