700 watt merc on 1000 watt mh/mv ballast « on: September 15, 2019, 10:59:07 AM » Author: ramdude2014
Can I run a 700 watt mercury vapor bulb on a 1000watt mercury vapor/metal halide ballast safely??
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	Re: 700 watt merc on 1000 watt mh/mv ballast « Reply #1 on: September 15, 2019, 11:17:50 AM » Author: HomeBrewLamps
Quote from: ramdude2014 on September 15, 2019, 10:59:07 AM Can I run a 700 watt mercury vapor bulb on a 1000watt mercury vapor/metal halide ballast safely?? I believe all you have to do is change the capacitor values but I'm unsure.
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	Re: 700 watt merc on 1000 watt mh/mv ballast « Reply #2 on: September 15, 2019, 12:23:19 PM » Author: ramdude2014
What cap would I have to switch to?
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	Re: 700 watt merc on 1000 watt mh/mv ballast « Reply #3 on: September 15, 2019, 12:40:40 PM » Author: HomeBrewLamps
Quote from: ramdude2014 on September 15, 2019, 12:23:19 PM What cap would I have to switch to? I'm unsure but I know that 700 mercury ballasts were usually 1000 watt ballasts with a different capacitor.... I'll search around for further info for you.
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~Owen

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	Re: 700 watt merc on 1000 watt mh/mv ballast « Reply #4 on: September 15, 2019, 12:41:37 PM » Author: wide-lite 1000
I don't know if this will help but my 700 w MV OV-50  has 3 caps- 2) 7.5uF & 1) 2.5uF . Total 17.5 uF  see this:   https://www.lighting-gallery.net/gallery/displayimage.php?album=5198&pos=84&pid=157821
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	Re: 700 watt merc on 1000 watt mh/mv ballast « Reply #5 on: September 15, 2019, 12:45:45 PM » Author: HomeBrewLamps
I will update this particular comment as I find more. Links to other threads containing useful bits of info will be posted here. 17MFD seems to be the cap needed but review these links to be sure. There was also another method mentioned utilizing a 250w and 400w ballast in series. 2008 - 700W MERCURY VAPOR 2014 - QUESTIONS ABOUT HID LAMPS AND BALLASTS (look at Solanaceae's comment)
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~Owen

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	Re: 700 watt merc on 1000 watt mh/mv ballast « Reply #6 on: September 15, 2019, 12:53:26 PM » Author: ramdude2014
I'll see if I have any 18uf caps! What voltage caps do I use currently 1000 watt uses a 24uf at 480volt?
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	Re: 700 watt merc on 1000 watt mh/mv ballast « Reply #7 on: September 15, 2019, 12:54:44 PM » Author: wide-lite 1000
Sounds like 17 or 18uF would be good for a trial run then I'd think at least 480 vac would work but maybe 600 would be better?
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