any hps ballast will run a mh bulbs 100% guaranteed. any hps ballast
You're crazy. It is not safe to just get any mh bulb and throw it into any HPS ballast. There is a reason that manufacturers do not reccomend you to do this. Just because you do it does not make it safe. There are engineers that are piad big bucks to make these products for a reason. I don't do it because I don't want to break shit or worse yet burn down my house. It's not a matter of if you don't do it keep your mouth shut. I'm sorry but I come from a mecahical back ground where we learned in school and on the job that there are somethings you don't do. If a specific product is made for a reason use it. They would not waste time to make swiching ballasts or conversion bulbs if they are not neccesary. You are going to get someone either (hopefully) upset when things break or worse hurt.
DO NOT listen to people just because they do something. It does not make it safe or right. Follow your manufactures instructions or ask your local hydroponics shop for advise on bulbs if you don't trust people on this site. those people are there to help and know what they are talking about.
I had a guy bring in his car to us. Hey jumped a fuse with a wire. It had worked for him for years and the car had started to have problems. It caught fire in our shop from that wire. He's lucky we caught it in time. He even said, well I've used it for years with no problem so that wasn't the problem. Well the fire told the real story. You might get lucky for a while, but if you aren't careful you will eventually get burnt.
Again if you want to arguee because I don't do it, I will arguee from a trained electrical point of view with education and theory. To settle it, just write an e-mail to a light manufacturer and ask them if you can just stick any bulb into any ballast, better yet call them and ask.