LED Lamp Soft Starter

161

03:52:43

I wonder if this could provide a longer lifespan for my LED bulbs, by protecting them from the stress of turning them on and off. 

The resistor is to discharge the capacitor. 

published 7 years ago

hurz

7 years ago

And why does a LED feel stress while startup?

Agoston99

7 years ago

I actually don't really know, but the bulbs we have at home can bear only 15000 on-off cycles, which is not that much. I would like to extend that by a little.

hurz

7 years ago

A "softstart" is probably more stress to your bulbs then a quick "normal" start. You have to understand why and what componente is in stress. LED bulbs, for mains voltage, do have much more components then just the LED itself.

Agoston99

7 years ago

I would put this in the bulb, parallel to the LEDs

hurz

7 years ago

But which of the LED-bulb components does get stress while switch on/off ??????????????????????????????????

Agoston99

7 years ago

The diodes

hurz

7 years ago

Which physical effect does cause this in detail please?

eekee

7 years ago

This would make sense with tungsten filament lamps, which have lower resistance when cold, and thus suffer a current surge when switched on. LEDs on the other hand are routinely pulsed too fast to see because they are briefly brighter when just switched on.

eekee

7 years ago

Er, now I've read the first comments (koff koff lol), I have to say I think your LED bulbs are designed to fail. (And as hurz implied, it might not be the diodes themselves which fail.) I've got one which is expected to last 5 years "in normal use", so maybe try a different manufacturer.

Agoston99

7 years ago

I don't know too much about LED's (the diodes), and I thought that they are the parts failing, but if it's the driver, that's a smaller problem. I would like to build a PWM controlled LED bulb for my room, and I wanted it to last long.

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