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400W Magnetic Ballast for Metal Halide Lamps

400W Magnetic Ballast for Metal Halide Lamps

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Here you can see the 400W metal halide ballast, very heavy. In the middle is the 30 uf capacitor, and then on the right is the ignitor.

I am wondering if I can use this ballast with 400W mercury vapor?

150w_HPS_SON_ballast.jpg 400w_Philips_Mercury.jpg 20160823_233202.jpg 20160823_232719.jpg

Light Information

Light Information

Manufacturer:Relco
Lamp
Lamp Type:For use with 400W Metal Halide lamps
Electrical
Wattage:400W
Voltage:240V

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Filename:20160823_233202.jpg
Album name:waterbug / HIDs & CFLs
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Date added:Aug 23, 2016
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sailormoon_01_uk
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Aug 23, 2016 at 03:40 PM Author: sailormoon_01_uk
Yep you can use this for 400 watt Mercury Vapour Lamps too as a 400w MV lamp runs at 3.25 amps. don't use the Ignitor.
waterbug
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Aug 23, 2016 at 08:33 PM Author: waterbug
Nice. I have another 400W hpmv ballast too which is rated 3.20A, by the way do you think the 0.3A is considered over-driving the lamp too much?
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Aug 24, 2016 at 12:31 AM Author: sailormoon_01_uk
0.3 amps is very minimal with Mercury Lamps as they can operate as high as 3.6 amps (400 watt), its the likes of High Pressure Sodium and Metal Halide Lamps you need to be careful as HPS lamps can over run and cycle, and Metal Halides over driven can explode.
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Aug 24, 2016 at 02:46 AM Author: waterbug
Thank you for the advise, yeah mercury don't need the ignitor. Also I am no electrician, this question may sounds silly as hell , is it possible that I could feed a resistor in-line with / between the ballast to reduces current flow? to maybe close to 3.25A?
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Aug 24, 2016 at 02:54 AM Author: sailormoon_01_uk
It will be OK to use the ballast without a resistor, also they make a resistor big enough to carry a 400 watt load, the biggest resistors I know of are only 10 watts.
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