ballast or bulb ?

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greedyfly2k11

Member
My ballast is a grow bright 1000w switchable and i can only get my MH bulb to light on the HPS setting and my HPS bulb wont work at all. Weird

I start the ballast up on the MH setting (mh bulb) and it sits there with a faint blue glow.....i flip the switch to HPS and BINGO we have light. So, it seems the ignitor is working but giving the MH bulb a little extra juice to get it fired up....but then why wont it fire an HPS? and why does my MH bulb need that extra kick???


bought the bulbs from HTG

here is the MH bulb
HTG Supply - GrowBright 1000 Watt Metal Halide Lamp

Here is the HPS:
HTG Supply - GrowBright 1,000 watt High Pressure Sodium Bulb
 
L

LVTDY

Well-Known Member
I don't know the technical side of things overly well, but it could be as simple as 'the new guy' built your ballast and maybe installed the switch upside down or something?

Then again, it could be something entirely different.
 
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greedyfly2k11

Member
LVTDY said:
I don't know the technical side of things overly well, but it could be as simple as 'the new guy' built your ballast and maybe installed the switch upside down or something?

Then again, it could be something entirely different.
Click to expand...

right..i thought that too and opened up the ballast. its wired right.
 
WattSaver

WattSaver

Well-Known Member
It's real simple, you have a bad ballast!!!
I had the same problem with a sun systems magnetic ballast, tried to find fault with everything else, did the warranty thing, new ballast, life's good.
A MH should not light on a hps ballast, and if the hps side won't fire a bulb then its a bad ballast.
 
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