RE: Re: GU10 LED Bulbs

["Richard Lists" <rich_lists@xxxxxxxxxx>]

Cheap ones that are series connected with a resistor will dim fine,
you may
need an incandescent on the circuit too to keep the dimmer happy.



Ones with switching powersupplies like the GU10 replacements will not, they
tend to let the magic smoke out, even if you try running them on a UPS they
die because of the waveform.



GU10s are evil and should never have happened IMO, if possible I would
re-fit for G5.3 low voltage ones and a centralized 12v supply. Even then
dimming will be problematic since not all them handle it well, the resistor
based cheapies with loads of 5mm leds are ok, but the ones with constant
current drivers and proper leds don't like it. I have seen external drivers
that take 0-10v for brightness control and PWM the LEDs but they are not
cheap.





From: ukha_d@xxxxxxx [mailto:ukha_d@xxxxxxx] On Behalf Of
Jvanka
Sent: Wednesday, October 08, 2008 4:33 PM
To: ukha_d@xxxxxxx
Subject: Re: [ukha_d] Re: GU10 LED Bulbs



did you guys actually tried to dim an led light?
I had some decoration xmas lights with led bulbs, and those where
connected to an x10 prong. I forgot about
the non dim-able issue, but for my surprise the leds actually dim
with no problem. weird, but it worked.

Juan . ///





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