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Join Date: May 2011
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Why is 160W Lamp Choke-less?

11/25/2011 11:46 PM

In our company we are using mercury as well as sodium of 125, 160, 400, 500W lamp...... in this i found that 160W mercury vapor lamp is choke-less.... I didn't know why...??? Please some one explain to me why 160w lamp alone is choke-less...????

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#1

Re: why 160watts lamp in choke-less...?

11/26/2011 12:03 AM

This lamp has both a tungsten and mercury vapour filament. So, it doesn't need a choke.

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#2
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Re: why 160watts lamp in choke-less...?

11/26/2011 12:16 AM

Lyn, were they "Sea-Ray" lamps? I've not seen one for many years.

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#4
In reply to #2

Re: why 160watts lamp in choke-less...?

11/26/2011 11:12 AM

No. It's one of those things I read somewhere, once.

No brilliant scientific deductions or revelations, just a brain cell that hadn't been killed by alcohol poisoning, yet.

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#3

Re: why 160watts lamp in choke-less...?

11/26/2011 12:21 AM

mr.lyn evry bulb wiil got a tungsten....??? why ur mentioning tis alone....

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#5

Re: Why 160 watts Lamp in Choke-less...?

11/26/2011 11:47 AM

I Picked up most of a case of them some years ago at an auction for $1 and I think I still have a few of them stashed away some place. I don't know what they are good for exactly but I kept them for some reason.

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#6
In reply to #5

Re: Why 160 watts Lamp in Choke-less...?

11/26/2011 12:02 PM

They're good for attracting bugs.

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#7

Re: Why 160 watts Lamp in Choke-less...?

11/27/2011 1:57 AM

The 160 watt Mercury Vapor Bulb is chokeless because the ballast is built into the bulb.

Self-ballasted (SB) lamps

There are mercury vapor lamps with a filament inside connected in series with the arc tube that functions as an electrical ballast. This is the only kind of mercury vapor lamp that should be connected directly to the mains without an external ballast. These lamps have only the same or slightly higher efficiency than incandescent lamps of similar size, but have a longer life. They give light immediately on startup, but usually needs a few minutes to restrike if power has been interrupted. Because of the light emitted by the filament, they have slightly better color rendering properties than mercury vapor lamps. The color temperature is higher than incandescent lamps.

They come in other sizes too. Here is one for sale.

http://www.buylighting.com/160-Watt-Self-Ballasted-Mercury-Vapor-Lamp-p/h160sbmv.htm

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#8

Re: Why 160 watts Lamp in Choke-less...?

11/27/2011 3:47 PM

we have other sizes of choke-less lamps in the market,as well as choke-less fluorescent lamps.It all depends on the manufacturer.A manufacturer can decide to design and build various power ratings of lamps based on research and development,for cost reduction or cost effectiveness,better product performance/improvement as well as market demand.It is not 160w lamp only that is choke-less.

Patrick Whowha

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