Voltage dimmer question

ash_scotland88

ash_scotland88

ash_scotland88

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1 Jul 2007
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Bought a new ceiling light for my room.

It uses 4x40w G9 halogen lamps.

When asking to make sure they were definitely dimmable I was told yes they were but best getting a 400w dimmer.

I've seen one I like the looks of, but it's 300w digital. Is the 400w one better safe than sorry? He said that with halogen it's best to multiply by 10 :confused:

Any advice?


if anybody is nosey google: GU6412E Electronic Dimmer
 
? I've heard going 25% over for halogens, but not 10times ??

And;

Will dimming my halogen bulb extend it's life?
The halogen cycle can be interrupted if the voltage and temperature of the lamp is operated too low. The result is lamp blackening. Lamp blackening and the consequent loss of lumens are standard for incandescent lamps, but halogen lamps are designed not to blacken as they age. Halogen lamps maintain their lumen output throughout their lifetime due to the key mechanism of the halogen cycle which binds with the tungsten that is vaporized off of the lamp filament itself. Thus keeping the bulb walls clean. If lamp engineers could figure a way to get the tungsten to redeposit evenly back on the lamp filament, we could have a lamp that lasts forever. But, this is not the case, as the tungsten is redeposited on the coolest part of the filament (usually the ends of the filament), and consequently over time, the middle portion of the filament eventually thins, forming a weak spot, and eventually the filament breaks.
The standard operating temperature of the bulb wall to maintain a halogen cycle is 250C. When the temperature falls below this level the halogen cycle fails, and the lamp starts to act like a standard incandescent. It is estimated that the cycle fails when a lamp is operated below 70-80% of its rated power.
Click to expand...

http://www.teklight.com/faq_s.html
 
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