The arc of my Sylvania HSI-TD 70W/WDL

It have Na-Sc, like FrontSideBus Sylvania HSI-MP 150W 3K lamp.
For some unknown reason, the dose of the halides is so large in my lamp, that its hides the arc.

File information
Filename:	IMG_0290.JPG
Album name:	dor123 / Lamps
Manufacturer:	Havells-Sylvania, Belgium
Type/Model:	HSI-TD 70W/WDL
Wattage:	70W
Filesize:	805 KiB
Date added:	12 Apr, 2026
Dimensions:	2048 x 1536 pixels
Displayed:	74 times
URL:	http://80.229.24.59:9232/gallery/displayimage.php?pid=24457
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Comment 1 to 8 of 8

Page: 1

FrontSideBus

[12 Apr, 2026 at 09:06 PM]

Let it run for a good few hours and then see if it the drops amalgamate together and drip down to the bottom.

Slyspark

[12 Apr, 2026 at 10:30 PM]

That's had a decent dose!

dor123

[13 Apr, 2026 at 03:19 AM]

@FrontSideBus: I doubt it would happen.

FrontSideBus

[13 Apr, 2026 at 06:35 AM]

How long did you run this for? Try it.

AngryHorse

[13 Apr, 2026 at 08:52 AM]

Very excessive Shocked

, I’ve got some elliptical clear Ventures in 4000K, 150 watt, and these have hardly any halide dose in at all!, it’s a wonder they produce any colour!, but they all do Very Happy

dor123

[13 Apr, 2026 at 01:29 PM]

The halide dose tends to expand when the lamp warms up and it melts.

dor123

[13 Apr, 2026 at 01:48 PM]

@FrontSideBus: It already has been run above 100 hours, and is stabilized.

FrontSideBus

[13 Apr, 2026 at 06:47 PM]

Well I've had plenty of lamps with halides like this on the sidewall, and most of the time after a few good hours of running it all settles to the bottom.

Comment 1 to 8 of 8

Page: 1

The arc of my Sylvania HSI-TD 70W/WDL

It have Na-Sc, like FrontSideBus Sylvania HSI-MP 150W 3K lamp. For some unknown reason, the dose of the halides is so large in my lamp, that its hides the arc.

It have Na-Sc, like FrontSideBus Sylvania HSI-MP 150W 3K lamp.
For some unknown reason, the dose of the halides is so large in my lamp, that its hides the arc.