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Philips ML 100W SBMV on a dimmer

Philips ML 100W SBMV on a dimmer

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Several experiments done on a 100W SBMV for 230V mains.
1. Lamp at full power without dimming. ML 100W at full power normally run the filament higher than SBMVs of higher wattages so while you still can see with a naked eye a difference in black-body temperature in comparison with incandescent bulb, with a camera it is hard to set it in a way that would pronounce the difference between the filament and the burner.
2. Cold lamp on lowest dimmer setting. A cold lamp strikes in such a way that filament does not glow and the arc is dim enough that the whole bulb is pink, due to fluorescence of phosphor coating, exactly like in a normal MV just after start.
3. and 4. were made after turning the dimmer up to 100%, allowing the lamp to run up to full brightness and then turning back the dimmer to lower setting. The lamp goes off but when it restrikes after a while, the arc is stronger than in a case of a cold lamp and much more bluish-green.
3. Low dimmer setting but higher than the lowest setting, filament is glowing a little bit.
4. Lowest dimmer setting like in 2., difference in arc due to different physical temperature, no glow from the filament. Worth noting is that the arc isn't exactly stable and continuosly jumps between normal electrode and neighboring starting electrode (SBMV for 230V mains have a starting electrode like normal MV lamps).
Different photos were made with different exposure so the brightness from different situations is not up to scale.

DSC64234.JPG DSC64239.JPG mix z napisami.jpg IMG_6057.JPG

Light Information

Light Information

Manufacturer:Philips
Model Reference:ML 100W
Lamp
Lamp Type:Self Ballasted Mercury Lamp
Filament/Radiator Type:Quartz Arc Tube & Tungsten Filament
Base:E27
Shape/Finish:Elliptical
Service Life:6000 Hours
Electrical
Wattage:100W
Voltage:225V-235V
Current:0.45A
Optical
Lumen Output:1000 lumens
Color Temperature:3600K
Color Rendering Index:CRI-58

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Date added:Nov 06, 2018
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rjluna2
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Nov 06, 2018 at 03:27 PM Author: rjluna2
This is an interesting experiment on the 230 Volts main

Pretty, please no more Chinese failure.

trojmiejski
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Nov 06, 2018 at 03:38 PM Author: trojmiejski
Such behavior might be also specific to ML 100W, I do not have higher wattage SBMV to test but I suspect that they may not strike at all on the lowest dimmer seting.
Lightingguy1994
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Nov 06, 2018 at 06:29 PM Author: Lightingguy1994
Wow nice experiment! I have a 160w Self ballasted lamp made by GE. Id so try this myself but I am 120v AC and do not wanna risk wrecking my NOS lamp
dor123
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Nov 07, 2018 at 12:44 AM Author: dor123
This lamp is for vertical base-up burning position. Operating it in other positions, may results in the arctube not warming up enough from the heat of the filament, resulting in a short lamp life.

I"m don't speak english well, and rely on online translating to write in this site.
Please forgive me if my choice of my words looks like offensive, while that isn't my intention.

I only working with the European date format (dd.mm.yyyy).

I hope that LED won't replace all forms of other light

trojmiejski
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Nov 07, 2018 at 01:54 AM Author: trojmiejski

Wow nice experiment! I have a 160w Self ballasted lamp made by GE. Id so try this myself but I am 120v AC and do not wanna risk wrecking my NOS lamp

As 120V SBMV have heating eletrodes they should start around 50% dimmer setting or more and when the setting will be lowered after achieving the arc, bimetalic switch may turn heating electrodes on again and extinguish the arc.
dor123
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Nov 07, 2018 at 03:11 AM Author: dor123
When the lamp is hot, the bi-metal takes time to cool down and close, and it determines the cooling down period of 120V SBMV lamps.

I"m don't speak english well, and rely on online translating to write in this site.
Please forgive me if my choice of my words looks like offensive, while that isn't my intention.

I only working with the European date format (dd.mm.yyyy).

I hope that LED won't replace all forms of other light

trojmiejski
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Nov 07, 2018 at 04:44 AM Author: trojmiejski
Shame that I don't have higher wattage SBMV to test how they behave.

Also I made a film where I recorded change in brightness depending on dimmer setting:
https://www.youtube.com/watch?v=IRAG_dGgKDE
dor123
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Nov 07, 2018 at 05:17 AM Author: dor123
160W SBMV lamps should be easy to reach.
Also: Your lamp is for operation at vertical base-up burning position because of the space between the arctube and the filament. Otherwise it would have shorter life.

I"m don't speak english well, and rely on online translating to write in this site.
Please forgive me if my choice of my words looks like offensive, while that isn't my intention.

I only working with the European date format (dd.mm.yyyy).

I hope that LED won't replace all forms of other light

trojmiejski
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Nov 07, 2018 at 05:26 AM Author: trojmiejski
I know, I just put it in horizontal position to make widescreen photos.
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