Re: What types of lamps exist on streetlight? « Reply #1 on: May 10, 2023, 03:41:21 PM » Author: AngryHorse
There’s generally just 2 types, sodium and mercury, not including LED! Sodium comes in low pressure (SO, SOI, SOX and SLI), and high pressure (NAV, HPS, SON, LUCALOX) Mercury also comes in low/medium pressure (Fluorescent MCFE, PL, MA), and high pressure (MB, MBF HQL, HPL), and then mercury halide/metal halide (MBI, HPI, HIT, HQI). It’s just the nomenclature that’s confusing!  Have a read of Lamptech in the links section, everything you ever needed to know is there!
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	Re: What types of lamps exist on streetlight? « Reply #2 on: May 13, 2023, 09:23:53 PM » Author: BT25
Don't forget metal-halide in all of its various forms.
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	Re: What types of lamps exist on streetlight? « Reply #4 on: May 14, 2023, 12:02:14 PM » Author: AngryHorse
Quote from: BT25 on May 13, 2023, 09:23:53 PM Don't forget metal-halide in all of its various forms. Already included , the MH is a “mercury discharge with metallic additives” (Thorn Lighting 1978), so technically still a mercury lamp
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	Re: What types of lamps exist on streetlight? « Reply #5 on: May 14, 2023, 12:14:55 PM » Author: AngryHorse
Quote from: joseph_125 on May 14, 2023, 12:15:25 AM I suppose high wattage incandescent hasn't been mentioned yet, it's largely extinct in the wild now but it wasn't too uncommon to find a small town or even a city with some incandescent streetlights during the MV era and even into the HPS era. Of the incandescent lamps, two major types were used for streetlighting, multiple and series. Multiple lamps basically ran directly off line voltage. Series required special lamps, shunts in the luminaire and a series regulator. The main advantages of series was the more consistent output on a string or lights, and I believe they were slightly more efficient than multiple lamps. I suppose halogen could have also been used for streetlighting but I'm not sure if any large scale installs happened as by the time halogen lamps were introduced, MV was the dominant source. There’s some rare photos of our little town in the early 1900s that show tungsten lighting in the old existing gas lanterns, but I’m not sure if higher wattage were ever used?, I’m guessing they may have been at some point? Sadly they were all gone by 1972 when I entered the world so I never got to see them! I am glad I got to experience our town lit in mercury though, before the mass SOX takeover in  the summer of 1980!
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Current: UK 230V, 50Hz
Power provider: e.on energy
Street lighting in our town: Philips UniStreet LED (gen 1)
Longest serving LED in service at home, (hour count): Energetic mini clear globe: 54,050 hrs @ 10/2/24

Welcome to OBLIVION