Hps Fixtures

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puckman

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ridgewood, n.j.
There are people at work who are putting bulbs 3 x to big [wattage] in the fixtures , they are a dark yellow . Won't this burn out ballast fixtures? Its been 2 weeks now and still working.
 
Yes. Odds are, the current ballasts cannot create the voltage needed to strike and maintain an arc. HPS isn't like incandescent and lets you pick and choose wattage. You need to match the lamp to the ballast.

For instance, a 100 HPS bulb needs 95-135 volts to strike an arc. A 250W HPS needs 170-255.
 
The fixture in question is a vmvs50m its a crouse hinds. I believe it is a 50 watt hps and it has 150 hps bulbs in them and have been in for a couple of weeks aleast. The 150 has a dark yellow light to them. The 50 hps burns a much lighter yellow close to white. My question is why hasen't the ballast burned out yet or why does the bulb light at all?

Thanks
 
puckman said:
There are people at work who are putting bulbs 3 x to big [wattage] in the fixtures , they are a dark yellow . Won't this burn out ballast fixtures? Its been 2 weeks now and still working.
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I agree with the others that the lamps must match the ballasts or reduced life of the lamps or ballasts can be expected.

There are some ballasts that can run more then one type or size of lamp. I like to use the ANSI Numbers for ordering HID lamps and ballasts and as long as those numbers match your all set.

Here are the ANSI numbers for MH lamps


50W M110
70W M98
100W M90
125W M150
150W M102
175W M152
200W M136
250W M153
320W M154
350W M131
400W M155
450W M144
575W M178
750W M149
775W M181
875W M166
1000W M141
2000W M134
 
brian john said:
I gave up on that issue LONG AGO.
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Yeah, it's not really an huge issue but one that is mentioned from time to time. Usually after someone looks closely they realize that they thought that it said lighting. Even I was guilty of that once. :smile:
 
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