Gypsy you can use mh with a hps ballast as long as it's a MH conversion bulb.
they are expensive bulbs though, and put out like 2,000 less lumen's than a regular Mh bulb.
What you get like a onion of homegrown from that 3rd pic?
Some great bud shots
yeh what mane said, lol. I actually just called my local dro shop guru to check into it for Thundercat, n hes tellin me as long as you get the Sodium conversion halide bulbs, you can use them on ANY hps ballast that you own as long as the wattage matches up. so TC, i wouldnt get that dual arc bulb man - i mean, im sure its cool to use, and probably really effective too, but your best bet would be to look into gettin the conversion bulbs. Theyre a little cheaper than your dual arc bulb too, probably by about 20 bucks, so look into that bro.
Also, somethin u might wanna know too, but i wouldnt recomend it - Is that you CAN actually run any MH bulb on a hps ballast. it WILL fire up and stay lit, but because its not meant for a regular MH bulb, they just dont consider it safe. i guess they did a test up at the dro shop, and they said they were able to run a MH bulb in a regular
HPS ballast for a complete grow, without any complications or blowouts, but he said that nobody should ever do that shit unless they have the money nd extra equipment to experiment like that cuz you could blow out your ballast, or the bulb could explode, lol.
But yeah, the entire reason they make those MH conversion bulbs are for the people who have HPS ballasts and wanna use both. The only wattage that NEEDS a conversion bulb no matter what ballast you have, is the 600w. they didnt make 600w MH bulbs until recently, they were all Conversion bulbs, n i dont know the reason why, but thats what they were, lol. I got a Illumalights 600w MH bulb, not a conversion, but its cheap and im gettin a conversion bulb from Growbright to replace it - bought from HTG supply. Apparently its like twice as bright as the illumalights brand bulb, but i dont see how, cuz mine was fuckin BRIGHT before i fucked with it, and it started to seem dimmer and dimmer every couple days.
Bah, im babblin again, but yeah TC, go grab the MH CONVERSION bulb. Its made for your specific situation, n id hate to see you throw away your extra money on a dual arc when all u need is the blue spectrum since you already have the red bro.