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SDW-T (White SON) 50W Gear: Ballast and Controller

SDW-T (White SON) 50W Gear: Ballast and Controller

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Controller (Ignitior-Stabilizer) and Ballast for 50W SDW-T (White SON) lamps.
I also have a nice floodlight for SDW-T lamps already – the only problem is, I don't have any SDW-T lamps unfortunately.
I want to build a nice decorative plant-growth shelf using a 50W SDW-T lamp (no I'm not going to grow illegal plants LOL).

Tungsram.jpg Orange Spiral Filament LED.jpg SDW-T_Gear.jpg NOS_SOX_18W.jpg

Light Information

Light Information

Manufacturer:Philips / Vossloh Schwabe
Model Reference:CSLS 50 / NaH 50II.539
Lamp
Lamp Type:SDW-T
Base:PG12-1
Electrical
Wattage:50
Current:0.76
Optical
Lumen Output:2300
Color Temperature:2550 K
Color Rendering Index:80-85
Physical/Production
Factory Location:Holland / Germany

File information

File information

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Filename:SDW-T_Gear.jpg
Album name:Skiller / Lamps, gear and accessory
Keywords:Gear
File Size:561 KB
Date added:Oct 01, 2012
Dimensions:2048 x 1362 pixels
Displayed:215 times
URL:https://www.lighting-gallery.net/gallery/displayimage.php?pos=-70503
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lantern_vision
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Oct 01, 2012 at 01:08 PM Author: lantern_vision
Some might tell you taht SDW-T lamps have less red emission, don't listen to them:)) I have excellent results:))

><@hm><

Skiller
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Oct 01, 2012 at 01:18 PM Author: Skiller
Yes, I have seen them all in your album, very impressive!
In fact your results are reason I went for SDW-T and not some fluorescent lighting.

I have bought some nice plants (a Bromelia among others) and they are going to need this extra light because there is not so much natural light during the winter in my room.


I will show the setup to you when it's built but for now I have to find a 50W SDW-T lamp first.
lantern_vision
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Oct 01, 2012 at 01:23 PM Author: lantern_vision
I have many 100's) I'll check for 50w for you...

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Medved
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Oct 01, 2012 at 01:31 PM Author: Medved
By the way, did someone checked, what exactly is inside the "CSLS50" controller? Some reverse engineering, redraw the schematic,...

No more selfballasted c***

lantern_vision
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Oct 01, 2012 at 01:35 PM Author: lantern_vision
Unlike Sn and SI ignitors of Philips this one has no opening:(( Totally covered

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Skiller
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Oct 01, 2012 at 01:42 PM Author: Skiller
Thanks a lot lantern_vision.

Yep, the Controller is completely filled with some white potting compound, actually the whole front is not covered with plastic. You can see the shiny potting compound in this picture beneath the terminals.
Kappa7
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Oct 03, 2012 at 02:48 PM Author: Kappa7
Medved:
Many years ago I've tried to open one of these controller, but as they are potted it was very hard. After cutting and breaking the compound I've reached the elettronic components: it's a quite complicated design based on a IC with a lot of components but, as it was impossible to remove all the compound, I didn't investigate further to understand the functioning.

Basically from what I've saw during the lamp operation the controller is a ignitor plus a power regulator to maintain the lamp power constant. It regulates the power by cutting the phase (I think like a normal phase cutting dimmer) but this cause the lamp to have a very high stroboscopic effect: I had one sdw-t of 100W in my bedroom but I've removed it because of the strong stroboscopic effect. I've tried also to rising the ballast inductance(by using another ballast) and this reduce the stroboscopic effect because the power regulator was cutting the phase nearer at the 100% of the cycle.

Now I've some spots with the newer SDW-TG lamp and electronic ballast and they didn't have any more flicker nor stroboscopic effect. I think that the electronic ballast use the same principle to regulate the power like metal halide one (DC-DC converter with constant power + low frequency square driver).
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