Difference between 18W SOX and SOX-E lamps? « on: May 23, 2013, 02:51:26 PM » Author: BG101
I just wondered if there was any - I also don't see why they have gone to the trouble of marketing several very similar wattages for SOX lamps (e.g. SOX 35 & SOX-E 36W, SOX 90 & SOX-E 91W) .. unless the E-versions are designed to run on ballasts for higher wattage lamps? Sorry for what must be daft questions! BG
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	Re: Difference between 18W SOX and SOX-E lamps? « Reply #1 on: May 23, 2013, 04:03:32 PM » Author: dor123
http://www.lamptech.co.uk/SOX.htm Read the comparison table between the SOI Integral, SOX Original, SOX Re-rated and SOX-E.
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	Re: Difference between 18W SOX and SOX-E lamps? « Reply #2 on: May 26, 2013, 01:16:09 PM » Author: BG101
That's really informative but doesn't show the difference between the 18W SOX and SOX-E lamps, however I will examine my lamps later and see if there's a difference in the IR reflective layer between the Philips and Osram lamps. I wonder if the Philips lamp has a higher light output? I should compare two lamps together to see if my old light meter can detect a difference .. or get it from the camera as that will also show up differences in light levels. I don't know how to access/read the EXIF data though. BG
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	Re: Difference between 18W SOX and SOX-E lamps? « Reply #3 on: June 08, 2013, 04:59:20 AM » Author: AngryHorse
There is no difference, the 18watt SOX came out with a brown cap, (standard), but later, when the economy range came out, the 18watt was added to them and given a black cap,(economy), but they are exactly the same lamp. Funny enough, most have Red caps, (longlife plus), now!!, appart from the PSG, (blue cap), lamps that are impossable to get hold of without paying a small fortune!
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	Re: Difference between 18W SOX and SOX-E lamps? « Reply #6 on: August 13, 2013, 02:39:19 PM » Author: dor123
Is the coating makes the SOX-E 18W, a self-starting LPS lamp, that can start from plain 230V with a simple choke? (LPS lamps that operates on an autoleak transformer, don't needs ignitors or starters to start, but aren't considered "Self-starting", since they still starting at a higher voltage than the mains)
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I"m don't speak English well, and rely on online translating to write in this site.
Please forgive me if my choice of my words looks like offensive, while that isn't my intention.

I only working with the international date format (dd.mm.yyyy).

I lives in Israel, which is a 220-240V, 50hz country.

	Re: Difference between 18W SOX and SOX-E lamps? « Reply #7 on: August 13, 2013, 03:17:04 PM » Author: Medved
Quote from: Ash on August 13, 2013, 01:50:07 PM How is the coating connected ? Or is it by itself the 2nd plate of he capacitor ? In order to prevent an electrolysis effects, the coating should be insulated from the terminals. But for the ignition is necessary only the AC electrical field. The trick is to use simple capacitor between the coat and electrode connection. For the AC it is somehow conductive, so the coat appear like being really connected, so the ignition voltage remain low. But the capacitor is still an insulator for any DC current, so no DC current could flow, so no electrolysis could occur.
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	Re: Difference between 18W SOX and SOX-E lamps? « Reply #11 on: August 14, 2013, 02:57:16 PM » Author: Medved
Quote from: Ash on August 14, 2013, 11:21:34 AM Why is this an issue only near the U bend and not along all the tube ? Because you need some support on the U-bend, as it is the end of the arctube structure. And because of the more thermal losses there, you need an additional mirror preventing the formation of a cold spot, so sodium condensation. And Philips use to make this support structure from metal, so electrically conductive. Along the straight section the arctube does not have to touch anything, so it stay well isolated from the IR reflector.
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