I have a 400 watt M59 metal halide ballast, it came with everything I need to grow with it. I got this for $30 MH bulb included so I couldn't pass it up, I want to know if anyone knows anything about M59's and if conversion bulbs can be used in it. I found THIS ONE .....has anyone here had experience with this?
You do know your link is for a metal halide bulb, right? I think you got the wrong bulb there. Try this one; 400W Sunmaster MH-HPS Conversion Bulb | Conversion Bulbs.
You can use a conversion bulb, but it's up to you. You could use the mh for veg. and the con. hps for flower. Good combo. Ultimately it's up to you.
I agree...however I would go with the better Sunmaster bulb. Its all about the spectrum and I believe you get what you pay for.