Low Pressure Sodium - Single Ended (SOI/H) Lamps

1955 saw the introduction of the first Integrated sodium lamp - the arc tube was now sealed within the outer glass envelope, and could not be removed, as had been the case with the SO/H lamp. This improved both the thermal insulation and efficacy of the lamps.

Currently, I have examples of lamps made by the following manufacturers:

| OSRAM |

| GLS | MBF | MCF | MBT | Cold Cathode | Glow Discharge | SO/H | SOX | SLI/H | Halogen | SON | MBI | CFL | Electrodeless | Hybrid | Cosmopolis | LED Retrofit |

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