SO/H and SOI/H low pressure sodium lamps on ignitor chokes? « on: November 12, 2021, 05:25:49 PM » Author: WorldwideHIDCollectorUSA
Since SO/H and SOI/H low pressure sodium lamps are often the predecessors of modern SOX low pressure sodium lamps, I often see people saying that SOI/H and SO/H low pressure sodium lamps are often interchangeable with SOX low pressure sodium lamps on the same ballasts. When I looked at the 85w and 140w SO/H and SOI/H low pressure sodium lamps, they have an arc voltage somewhere between 140v and 160v, which seems pretty high for operation on 220-240v ignitor choke ballasts. I would like to know if 85w and 140w SO/H and SOI/H low pressure sodium lamps are able to satisfactorily operate on the 220-240v ignitor choke ballasts that are intended for 55w and 90w SOX low pressure sodium lamps respectively or whether they really need high OCV HX autotransformer ballasts.
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Desire to collect various light bulbs (especially HID), control gear, and fixtures from around the world.

DISCLAIMER: THE EXPERIMENTS THAT I CONDUCT INVOLVING UNUSUAL LAMP/BALLAST COMBINATIONS SHOULD NOT BE ATTEMPTED UNLESS YOU HAVE THE PROPER KNOWLEDGE. I AM NOT RESPONSIBLE FOR ANY INJURIES.

	Re: SO/H and SOI/H low pressure sodium lamps on ignitor chokes? « Reply #2 on: November 12, 2021, 05:51:06 PM » Author: WorldwideHIDCollectorUSA
Would the 85w and 140w SO/H and SOI/H lamps have a hard time maintaining an arc on ignitor choke ballasts? For example, would a 85w SO/H or SOI/H lamp have a hard time maintaining an arc on a 55w SOX ignitor choke? In addition, would a 140w SO/H or SOI/H lamp have a hard time maintaining an arc on a 90w SOX ignitor choke?
« Last Edit: November 12, 2021, 05:58:42 PM by WorldwideHIDCollectorUSA »		Logged

Desire to collect various light bulbs (especially HID), control gear, and fixtures from around the world.

DISCLAIMER: THE EXPERIMENTS THAT I CONDUCT INVOLVING UNUSUAL LAMP/BALLAST COMBINATIONS SHOULD NOT BE ATTEMPTED UNLESS YOU HAVE THE PROPER KNOWLEDGE. I AM NOT RESPONSIBLE FOR ANY INJURIES.

	Re: SO/H and SOI/H low pressure sodium lamps on ignitor chokes? « Reply #4 on: November 12, 2021, 06:00:43 PM » Author: WorldwideHIDCollectorUSA
Maybe James can chime in on this subject.
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Desire to collect various light bulbs (especially HID), control gear, and fixtures from around the world.

DISCLAIMER: THE EXPERIMENTS THAT I CONDUCT INVOLVING UNUSUAL LAMP/BALLAST COMBINATIONS SHOULD NOT BE ATTEMPTED UNLESS YOU HAVE THE PROPER KNOWLEDGE. I AM NOT RESPONSIBLE FOR ANY INJURIES.