Quick Lighting Question, Please Help!!

Ok Im New Here but i been doing my research for a while and seen all the different lighting options for veg growth as well as Flowering Stage. I've Decided to go with H.I.D. but like most people im looking for the best buy in Dual MH / HPS 400W. I Seen that they make Conversion Bulbs like a MH conversion bulb that works in a HPS Ballast and Vise Versa, I will be growing 4-5 plants and wanted to know if it makes a difference in whitch should be my primary light if i get the conversion bulb? I Heard MH is the most important but damn, the HPS is the light that magnifys the yield ya kno, and whats the deal with the different Voltage? Please Help me Out!

usa 120v
europe 240v
your ballast runs cooler on a 240v thats about it.
never heard hps magnifies?

hey karmaxual, thank u for the reply and clearing up the voltage for me, with the hps magnifies part i meant hps makes the big ripe buds while MH is basiclly blue spectrum for veg, but if you get a conversion bulb does it matter whitch is your primary light/ballast between MH and HPS?

if you buy a 400w hps ballast you can run your mh light in it. but if you buy a 400w mh ballast you cant run a hps in it.

Mobay, Thank you for your responce i think im starting to see the light now, lol.. Im prolly Gonna go with the HPS 400W and just get the MH Conversion Bulb.

Question, and I know this isn't my thread but the question regards lighting. How low of wattage do they make MH conversion bulbs in?

whats up Kush Over, you should check out bghydro.com, i seen MH conversion bulbs as low as 175 watt for 250 watt hps

that is what i did with my grow , got a 400w hps ballast and vegged with the mh and flowered with the hps. 1 plant

Mobay thats a beauty right there, u defenitley convinced me, ill be ordering the hps on monday, whats the strain if u dont mind me askin and what strain is good 4 indoor thats also pretty potent? Thanks for your time...

what kinda nute's u using ?