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Thorn 200w HO SLI/H on 150w SON choke. Looking at the lamp current and voltage of a Thorn 200w SLI/H lamp being ran on a 150w SON choke. The actual spec for this lamp is 145v at 1.6 amps. Channel one (yellow) is the arc voltage and channel 2 ( blue) is the lamp current. The 150w SON choke is the closest match I could find out of the gear I have available but is slightly overdriving the lamp. I also tested a 200w halide and a 200w sunbed lamp choke which both looked promising during the run up but after several minutes the voltage dropped and the current peaked at about 2.2 amps. I might have to see if I can source a 175 halide ballast or a 180w sunbed choke and test that.

Thorn 200w HO SLI/H on 150w SON choke.

Looking at the lamp current and voltage of a Thorn 200w SLI/H lamp being ran on a 150w SON choke.
The actual spec for this lamp is 145v at 1.6 amps.

Channel one (yellow) is the arc voltage and channel 2 ( blue) is the lamp current.

The 150w SON choke is the closest match I could find out of the gear I have available but is slightly overdriving the lamp.

I also tested a 200w halide and a 200w sunbed lamp choke which both looked promising during the run up but after several minutes the voltage dropped and the current peaked at about 2.2 amps.

I might have to see if I can source a 175 halide ballast or a 180w sunbed choke and test that.

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Album name:FrontSideBus / Tests & Experiements
Filesize:43 KiB
Date added:07 May, 2016
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Comment 1 to 6 of 6
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AngryHorse   [07 May, 2016 at 08:20 PM]
Sodium lamps being sodium lamps, my first test of lighting these, (2011), was to put 2 100watt tube chokes together, this resulted in a `wild` glow from both cathodes!!, but 150watt son gear is the best, (and easiest), to get hold of.
thorncollector   [07 May, 2016 at 08:44 PM]
160w sunbed ballast underuns the lamp but better than overunning it on a son choke
Andy   [07 May, 2016 at 08:54 PM]
I tried both a 180w sunbed ballast and a 175w MH ballast and if I remember correctly they both ended up delivering a bit too much current and as a result the arc voltage was lower than it should have been. I didn't use anything as fancy as an oscilloscope mind.
Danny   [07 May, 2016 at 09:15 PM]
I've always used 150w son choke would rather the correct gear tho! But finding it will be like rocking horse shit
FrontSideBus   [17 May, 2016 at 12:01 PM]
Anybody ever tried two 80w Mercury chokes in parallel?
AngryHorse   [17 May, 2016 at 09:37 PM]
Would be an interesting test, if I didn`t only have one of them! Confused

Comment 1 to 6 of 6
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