Will these MH bulbs work?

This may sound like a stupid question but I'm only halfway through my first grow, using cfl's, so im not too confident in my lighting knowledge.

I came across these
http://www.ebay.co.uk/itm/Venture-150W-ES-metal-halide-elliptical-coated/151081030119?rt=nc&_trksid=p2047675.m1851&_trkparms=aid=222002&algo=SIC.FIT&ao=1&asc=16351&meid=334549815897809014&pid=100005&prg=7784&rk=2&rkt=4&sd=151080994263&

http://www.ebay.co.uk/itm/Venture-150W-ES-metal-halide-elliptical-clear/151080994263?rt=nc&_trksid=p2047675.m1851&_trkparms=aid=222002&algo=SIC.FIT&ao=1&asc=16351&meid=334570815670485784&pid=100005&prg=7784&rk=2&rkt=4&sd=151081030119&

I already have a box full of Edison Screw fixtures and my sparky uncle has donated me a 250w ballast so i figure this would be my most cost effective option.

The only reason I haven't already made the purchase is because the listing isn't very informative and I don't know if MH is MH or if there's specific types better suited to cultivation. Has anyone used these bulbs or similar ones before and if so are they effective?

Thank you all in advance for any guidance

SR

you want a 250w bulb if that's what your ballast is

oakley1984 said:

you want a 250w bulb if that's what your ballast is

Click to expand...

So am i wrong in thinking that the power rating of the ballast is the maximum and it can be adjusted to suit lower rate bulbs?

Correct. You are wrong. kiss-ass

Sorry lol. Okay, if you have a DIMMABLE or NON-DIMMABLE XYZwatt HPS ballast you need to use a XYZwatt HPS or MH bulb. If you have an MH ballast ONLY use MH bulbs (again, of the same wattage). In your case, XYZ=250w.

(Manufacturers don't recommend running different wattage bulbs even on dimmable ballasts; there are one or two ballast companies who say it's fine, I forget which)

mrCRC420 said:

Correct. You are wrong. kiss-ass

Sorry lol. Okay, if you have a DIMMABLE or NON-DIMMABLE XYZwatt HPS ballast you need to use a XYZwatt HPS or MH bulb. If you have an MH ballast ONLY use MH bulbs (again, of the same wattage). In your case, XYZ=250w.

(Manufacturers don't recommend running different wattage bulbs even on dimmable ballasts; there are one or two ballast companies who say it's fine, I forget which)

Click to expand...

Haha, thanks for clearing that up. So if i was to invest in a 150w HPS ballast i could use this bulb for veg then pop in a 150w HPS for flowering?