I have just replaced eight halogen lights in my kitchen with Philips 8W
Dimmable LED units 8718696492307. They are working pretty well with the
old halogen transformers but I would like to use a dedicated LED driver
of good quality (as most lighting people advise). I tried out a Long
Life Lamp Company dimmable LED driver rated at 12 W but it just caused
flashing of the light and I am returning it. I put the old transformer
back and is working all OK again.I don't want to keep making mistakes
(if I have please advise) buying expensive failures so has anyone with
the knowledge able to point me to a good driver?
A 'bare' LED will almost certainly perform best with a dedicated driver.
But a bare LED doesn't run from AC. So your LEDs already incorporate
driver electronics. So all that should be needed is an adequate AC supply
at the correct voltage.
Of course it's quite likely your LEDs don't have state of the art drivers.
After all, a better LED is always just round the corner.
*Time flies like an arrow. Fruit flies like a banana.*
Dave Plowman email@example.com London SW
Usually the problem is that the low load of LED retrofits is below minimum load on the electronic trafos.
Your present LV transfomers working fine unless there is safety case for replacement, wouldn`t bother.
Philips spec for the lamp allows 12-24V so even wound trafos drifting up in voltage wouldnt be a problem.
To be fair to LLLC they do say
"These drivers should not be used with dimmable led bulbs as this can cause interference and flickering."
In a kitchen the limitations of line dimmed LEDs, they wont dim to zero , are probably tolerable, lamps with external drivers not worth the complication.
Thanks for that. Yes I am inclined to just stick with existing
transformers (saves money), although I have emailed Philips for their
view.Incidentally, the long life driver was advertised (and still is )
as being dimmable. Product description from website "Dimmable LED Driver
12w DC, 5% to 100% dimming, Using G4,MR16, MR11 and LED Strip LEDs light
bulbs with this LED driver instead of an existing Low Voltage
transformer will double the life of the G4, MR16 and MR11 LED Light
Bulb, constructed to very quality for extended reliability and long
life, made by Long Life Lamp Company"
21/09/2015 00:05, Adam Aglionby wrote:
On Tuesday, September 22, 2015 at 7:24:25 PM UTC+1, firstname.lastname@example.org wrote
he life of the G4, MR16 and MR11 LED Light" same guys do the VW emissions t
Weeell, yes lowering average power through the LED will probably extend it`
s light producing life, like dimming an incandescent lamp will also extend
Dimming incan, the efficacy drops out the sky, energy consumption is not li
near with light level. Slow starting incan lamps greatly extends their life
Dimming LED , efficacy remains pretty much the same or even increases a bit
,because of cooler running. LEDs could care less about being slow started
or flashed at high rates.
O.P.`s Philips lamp has a rated lifespan of 15K hours to L70, output down t
o 70% of intial, might extend that by having it constantly on dim, but then
to get the desired illumination level, have to use more lamps, the saving
of extended lamp life disappears...
Dimming on pretty much every circuit should be the standard ,for comfort re
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