Little lighting question

Sup guys, long time reader first time poster. Right now I have about 15 plants under a 1000 watt hortilux super hps enhanced spectrum. It's a hydro setup. They seem to be growing...ok. Not super great, just ok. I got the nutrients mixed well and ph checked often, bubblers in the water and hydroton as medium. Well they're in veg stage and its been a few weeks. well anyways my question is, how much of an improvment am I going to see if I go ahead and put a 1000 watt MH bulb along side with my HPS bulb.

Thanks in advance, and sorry if this topic is somewhere. I didn't see any specifics on it.

you will see dramatic improvements - as long as you can handle temps.

Ideally you should be using MH bulb for vegging anyway, will give you much better results, so you may not have to use HPS bulb until flowering.

yeah if you can afford it and handle the temps, then just put the mh bulb for veg, and switch to hps for flowering