U.S.A vs Europe: 1000w High-Pressure Sodium

Two 1000w SON-T lamps which probably couldn't be more different!

On the left is a GE Lucalox which is a high voltage lamp.
And on the right is a Radium RNP-T which is a low voltage type.

Check out the differences in the arc tube length and diameters! So what do you prefer? Long & thin or short & girthy?
It's interesting to see these two types of SON lamps lit together.

Was quite bright! 260,000 lm of golden yellow goodness!

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Comment 1 to 5 of 5

Page: 1

Kev

[12 Apr, 2026 at 10:45 AM]

The radium looks like a more intense light what gear did you use to light the US HV SON? I dare say I expect the lucalox to last longer in service.

FrontSideBus

[12 Apr, 2026 at 11:30 AM]

I used my 1/2kw gearbox that has two of those Venture step up transformer ballasts in it. Ran this quite well and is quite a handy bit of kit tbh.
clickage

Alex

[12 Apr, 2026 at 12:14 PM]

The Radium lamp is actually made by narva. Osram stopped making there own 1000W SON lamp (Exept the Planstar 1000W 400V) with closure of shaw

Danny

[12 Apr, 2026 at 01:11 PM]

Must have been bright in there lol

AngryHorse

[12 Apr, 2026 at 02:55 PM]

That’s one hell of an arc core in the GE ! Very Happy

Comment 1 to 5 of 5

Page: 1