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Caster MH100 & MH100-4 Comparison

Caster MH100 & MH100-4 Comparison

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Here are two Caster 100w Metal Halide ballasts, i wanted to see how different these two ballasts are. The MH100 (left) is the more common, cheaper ballast with only one voltage input (120v), this ballast is common in Casters residential grade fixtures. This ballast comes pre-equipped with a Caster IG-240 Ignitor to start the lamp. The ballast core size is 72x98x32.6mm.

The MH100-4 (right) is the less common commercial grade ballast with four voltage inputs (120v, 208v, 240, and 277v), this ballast is often seen in Caster commercial grade fixtures, this ballast comes pre-equipped with a Caster IG-240 Ignitor to start the lamp and a 10uf MPP capacitor for power factor correction. The ballast core size is 72x98x39mm.

Now for the testing, both were tested with the same lamps, the line voltage was approximately 118v during the duration of the tests.

The MH100 current with a 100w metal halide lamp,
Watts: 111
Amps: 2.17
PF: .43

The MH100-4 Current with a 100w metal halide lamp,
Watts: 118
Amps: 1.17
PF: .86

Now i was going to try to get current readings from the lamp side of the ballast on the MH tests, but i feared the ignitor would damage my multimeter, so instead, you'll have to settle with ones from the MV test.

The MH100 current with a 100w mercury vapor lamp,
Watts: 118
Amps: 1.74
PF: .57
Lamp Current: 830mA

The MH100-4 current with a 100w mercury vapor lamp,
Watts: 138
Amps: 1.48
PF: .79
Lamp Current: 920mA

So looking at the current tables, it looks like the MH100 is optimized for 100w MV lamps, but not as much for 100w MH, whereas it's the other way around for the MH100-4.

The lamps used for this test were a Polerlites 100w MH and a Chinese Westinghouse 100w MV.

20200827_0304105B15D.jpg 20200808_2220065B15D.jpg Ballast2.png 20200622_0130245B15D.jpg

Light Information

Light Information

Manufacturer:Caster
Fixture
Ballast Type:M90
Physical/Production
Factory Location:China
Application/Use:Lamp Ballasting

File information

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Date added:Jul 04, 2020
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Silverliner
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GoL
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Jul 05, 2020 at 05:11 AM Author: Silverliner
Interesting comparison!

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Zack


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Jul 05, 2020 at 01:22 PM Author: Fluorescent05
Very interesting!

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GoL
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Jul 05, 2020 at 04:33 PM Author: joseph_125
I won't be surprised if the MH100 was really a H38 HX-NPF MV ballast with a added tap for an ignitor.
High Intensity
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GoL
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Sep 17, 2020 at 04:30 AM Author: High Intensity

I won't be surprised if the MH100 was really a H38 HX-NPF MV ballast with a added tap for an ignitor.

I was suspecting this going into these experiments, and the outcome seems to confirm this. In fact, i wouldn't be suprised if 99% of generic M90 ballasts are just H38 ballasts with an extra wire tap.

Old lighting is, and will always be, the best lighting.

WorldwideHIDCollectorUSA
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MH, HPS, MV, and SOX lighting forever.


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Dec 04, 2020 at 04:10 AM Author: WorldwideHIDCollectorUSA
Did you also measure the lamp currents for the 100w M90 pulse start metal halide lamps during this test?

Say NO to ballast and bulb bans. MV, MH, HPS, and SOX forever!!!! Magnetic preheat fluorescent forever!!!!!

Desire to collect various light bulbs (especially HID), ballasts, and fixtures from around the world.

High Intensity
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GoL
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Dec 04, 2020 at 04:30 AM Author: High Intensity
No, as i thought the HV pulses from the ignitor would kill my multimeter.

Old lighting is, and will always be, the best lighting.

WorldwideHIDCollectorUSA
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MH, HPS, MV, and SOX lighting forever.


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Dec 04, 2020 at 04:53 AM Author: WorldwideHIDCollectorUSA

No, as i thought the HV pulses from the ignitor would kill my multimeter.


Do you have a clip on amp meter?

Say NO to ballast and bulb bans. MV, MH, HPS, and SOX forever!!!! Magnetic preheat fluorescent forever!!!!!

Desire to collect various light bulbs (especially HID), ballasts, and fixtures from around the world.

High Intensity
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GoL
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Dec 04, 2020 at 05:11 AM Author: High Intensity
No, but i hope to get one this year.

Old lighting is, and will always be, the best lighting.

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