EOL SON lamp turns green at cold start, then goes in cycling mode
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- Опубликовано: 8 сен 2024
- This old blackened 150 Watt High Pressure Sodium lamp still strikes on, and gives an awesome green glow at start up. As expected the lamp has done many hours and was replaced and a led lamp was fitted instead.
Just got into HPS lamps. A neighbor was selling some tiny 35w fixtures at a yard sale. I snatched up as many as I could fit on the back of my bike. (Four of 'em.)
Two of them worked out of their boxes. The third had an internal connector messed up. After fixing that, it's currently illuminating my room as I type this comment.
The last one had a physically broken bulb (saw glass shards inside, would not start, a tiny blue glow at the base when the fixture was powered up).
I feel like I've captured a bit of history with these little lamps before it disappears for good, the soft reassuring amber glow replaced by cold white LEDs.
Great stuff. You can't beat the glow of Sodium lamps. 35 Watts is that not Low Pressure Sodium ? They start up in pinkish red, looks even better than HPS.
The green glow at startup was common with older generation SON lamps (mid 80s) as I observed, most of the 250W ones that were brand new back then did that.
Later on from some UK websites (that have long since disappeared) I learnt the chemical reactions in the lamp particularly as they age. When the sodium is depleted sufficiently the cycling phenomenon starts and the blue glow is the penning mixture usually mercury vapor and other gases like neon.
A good few years ago I played around with these and they don’t exhibit this green glow because of the ban on mercury. Instead they glow weak orange or don’t work at all
The SON and SOX lamps have been so loyal, I can’t see these LED replacements ever giving such good long service.
I’ve stockpiled enough new old stock SON and SOX lamps to hopefully not require the change of my fittings
Nice colour transition, the blue/green phase is almost like a Cadmium lamp spectrum until the sodium warms up. I noticed that here in central Australia the SON lamp enclosures are quickly being replaced with LED heads, much prefer the old style lighting units. Best to try and save as many as you can when they end up in the recycling bin.
It's too bad that SON lighting never caught on here in the states. We mostly had low and high pressure sodium bulbs which were extremely strong in the yellow spectrum and had horrible color rendering. The LEDs are a very welcome change from those awful things.
@@dmoore0079 SON = what the Americans cal HPS OR high pressure sodium lamps the LOW pressure lamps are the ones with NO colour rendering and are "SOX" lamps
and SON is VERY common in the USA more so then in Australia / Europe
Came for the lights, stayed for the sounds. Cheers!
That was a cool start up I'm surprised it started at all listening to that poor ignitor struggling
..
Nice mercury discharge until the remaining sodium vaporized
The HPS lamp still working with 120-277V 60Hz CWA American ballast in 240V 50Hz from New Zealand electricity
With the condition of that bulb I'm surprised it was able to start at all, I've never seen one with that much wear on it. There's a few lamps around here that have been cycling for a while, I wonder what kind of condition their bulbs are in.
I had a cycler near my house that was so used up and neglected that when it warmed up before cutting off, it was pure pink almost turning reddish! Was pretty dim and took about 5 minutes to light again too. The arc tube was pitch black and the bulb itself was developing that black-mirror look from the sodium leaking out. It finally went completely out and a couple of months later was replaced with not LED, but a new lamp!
@@Lunar_Capital Awesome that they replaced the bulb rather than the fixture, they are going away pretty fast now.
Sounds like the lamp on my street. Our street is private property, so when our electric service changed companies they have no real way for me to report the lamp.
It's been cycling for probably years at this point, and will only stay on for a few seconds at a time.
We (those on my street) may have to start maintaining the fixture ourselves. Somehow.
@@Lunar_Capital there is one near my place that was a cycler then one day it was a bright MERCURY lamp colour and has NOT lit since
definitely has seen some better days
Beautiful
The green glow is from mercury before sodium vaporizes. Mercury-free lamps are also in the market but it starts yellow._
that is funny that they start the opposite one's color!
Wow, that 150 Watt lamp looks lonely in that Optispan, poor thing is certainly end of life.
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does it says when the lamp was made (date code ) ?
That has run a lot of hours! poor thing
Cool
Is this the failure mode where the pressure goes up too high as the bulb ages?
I want to know why it no longer stays lit also. I always thought there was some kind of thermal protection in the bulb kicking in and out.
You’re exactly right!
Is this HPS (High presure sodium) lamp and SOX means LPS (low presure sodium)?
Correct.
that bulb is spent.
This hps lamp shouldn’t work at this point. Because it’s a Philips hps bulb it will still hold fine for another 2000 hours until it dies
Hps lamp