Do I have a HPS or MH conversion bulb?

[po'thead]

I have this light system. http://www.amazon.com/Watt-Electronic-Ballast-Hydroponic-Light/dp/B002J7PYSU/ref=sr_1_3?ie=UTF8&s=home-garden&qid=1266266890&sr=8-3

I want to upgrade my HPS bulb and I don't want to order something fancy and have it not fit. So, my question is. Do MH and HPS have the same size part that screws into the socket? The bulbs that came with this are identical except for what is inside the glass. If I need to I can post pics of the bulbs.

 

[Pipe Dream]

APPARENTLY THAT LIGHT IS CAPABLE OF using both hps or mh so just get any 400 watt hps or mh bulb.

 

[po'thead]

That is exactly what I was hoping for.

 

[bigdaadio]

Did it work?

 

[uFarm]

Product Features

• Includes one High Pressure Sodium (HPS) bulb (400W) and one Metal Halide (MH) bulb (400W)
• Electronic ballast works with both High Pressure Sodium (HPS) and Metal Halide (MH) bulbs
• Electronic ballast is UL-listed, CE certified
• Two-year manufacture warranty on electronic ballast
• Integrated light reflector

The ballast is switchable between a 400w MH and a 400w HPS bulb; there are two separate bulbs included in that bundle thing.

 

[bulla]

i think most of the new ballast can run either mine all do

 

[fabfun]

the only difference between hps and mh is hps hs the addition of a ignitor where a mh bulb has ignitor built into bulb

i think most of the new ballast can run either mine all do

 

[fabfun]

btw that is a switchable ballast
pull the trigger on that one

but if u have a small grow area u might wat a air cooled hood

 

[bulla]

the only difference between hps and mh is hps hs the addition of a ignitor where a mh bulb has ignitor built into bulb

right but the new balast they make except either bulbs ? cause i know on the old ballast u either use mh or hps or u get a conversion bulb....so my question is do they even make a hps or mh ballast like they use to or are the bulbs all inner changable now?......edit ....im talking about those big baulky white ballast that use to hum louder than your radio....lol i dont see them in stores anymore those only ran one bulb or conversion

 

[fabfun]

no they dont make all ballast like that just grow ballast i use streetlights
a switchable ballast like u refer to is just a reg ballast and a switch that when u flip it to hps has a ignitor they still make just hps ballast and mh ballast
but the safest buy is a hps ballast then u can run both but if u get a mh u got to add ignitor or conv bulb hope i made sense lol

right but the new balast they make except either bulbs ? cause i know on the old ballast u either use mh or hps or u get a conversion bulb....so my question is do they even make a hps or mh ballast like they use to or are the bulbs all inner changable now?......edit ....im talking about those big baulky white ballast that use to hum louder than your radio....lol i dont see them in stores anymore those only ran one bulb or conversion

 

[NoGutsGrower]

Digital ballasts will take either bulb and they switch automatically.

 

[fabfun]

they just have a relay that replaces switch

Digital ballasts will take either bulb and they switch automatically.