Of course, all sodium lamps appear orange - amber for most people. I'm talking about the ones with an orange coating on them.
I've seen Rommie's Amber glassed SO/H, supposed as a darkroom safelight.
I've seen Max's SOI safelight
But this is a new one. On Ebay I've just found a Philips 35 watt SOX lamp with an orange coating. The seller claims it was intended for TV high masts / tall buildings for a warning light (like the red aviation beacons). I have attached an image below. Does anyone have some insight on this? Is it just another safelight or is it genuinely a safety light?

I've seen the 45W SOI/H that James has on Lamptech, but that was definitely intended as a darkroom safelight, and also Max's one, but I've not come across a SOX version so far. Pity the paint is flaking off, or I'd be interested.

The paint is a shame, but who knows if there is another on about?
It's on auction, so I don't want to encourage a bidding war, but right now it's at £15.00, cheaper than most SOX lamps nowadays

Yeah the flaking paint is a shame. Hopefully a collector gets up getting it. It would be a shame if someone got this and intended to scrape off the paint in order to use it as a regular SOX lamp.

It’s interesting to see Philips continued making these orange-painted lamps far longer than they were listed in the catalogues, I did not know that a SOX version existed.

I do think it would be a darkroom safelight rather than an aerial obstruction lamp.  That latter application would not be sensitive to actinic blue light and require painting.  Moreover, aviation laws require the use of red obstruction lamps, usually flashing.  An orange sodium colour lamp would be quite indistinguishable from ordinary ground streetlighting.

There were, however, pure neon versions of sodium lamps that were made specially for aviation lights.  They were almost the same as sodium types but without the sodium, and filled with a lower neon pressure than normal to increase the light output, plus with some xenon to extend their lifetime.  GE/Thorn made those until around 2005.

Good luck with the bidding on this one!

Thanks for the insight, James