Re: Yet another LED GU10 thread...

["Howard" <howardsixtynine@xxxxxxxxxxx>]

Hmm. Thanks for the suggestion, but those lamps look suspiciously
similar t=
o the ones I've just returned... I'm going to be very wary of unknown
brand=
lamps from now on.
Currently considering Aurora AU-GU1060/30 or A2-GU1006/30. Anyone tried
the=
se?

--- In ukha_d@xxxxxxx, Richard Challis <richard@...> wrote:
>
> I've been using some LED lights from Toscal (on the forum)
> www.casatech.eu.  I have 6 non-dims in my office, 2 in node zero and 3
> dim-able in the kitchen. They are 6 watt. Have a very wide /even beam.
> I'm using most of them in heak-sink fittings to stop air leakage
> through the ceiling and they seem to run cooler than most.
>=20
> I tried some non-dims LED's from B&Q in the office before and for
the
> same wattage, the light level increase and evenness of beam was
> remarkable.
>=20
> The non-dims are being switched by Idratek's 4-channel relay module
> and probably get switched 20-40 times a day. No failures in 9 months.
>=20
> The dimmables get used and switched aprox 20 times a day. I have them
> on a dimmer unit. with a fast ramp up and slow ramp down to give a
> chance for the person to move to let Idratek / Cortex know that there
> is someone still in the room with the automatic person detection.
> Currently they are being used and completing well with some
"normal"
> 50 watt gu10s.  I only noticed any flicker below aprox 33-25% but I
> don't run them ever that low anyhow.
>=20
> The only issue I had with them is that the heatsink didn't fit in some
> of the fittings (it has a little circlip like ring to hold the lamp
> into a recess -
> http://cpc.farnell.com/firebreak/fggw/downlight-mv-fire-tilt-white/dp/LA0=
2989.)
> I needed to Dremel out the ring a bit to get them to fit. The more
> expensive heatsink fittings worked well with no modification. (google
> for - AU-DLM621W)
>=20
> I plan shortly to get some more and get rid of the rest of the
halogens.
>=20
> I have no connection with Toscal other than being a happy customer.
>=20
> Regards
>=20
> Richard
>=20
>=20
> On 17 October 2012 10:06, Adrian Eaton <adrian@...> wrote:
> > Maybe it depends on which 35-50w bulb you are comparing it to? I
have
> > compared the 29 led one to a cheap 50w bulb and it seems as
bright to m=
e. I
> > haven't tried the 27 led version though but as you say I would be
surpr=
ised
> > if it made that much difference.
> >
> >
> >
> > I suspect that is why they don't come with a glass front to help
with h=
eat
> > issues. I don't think they have come up with a perfect
replacement yet
> > unfortunately but this seems fairly good for now.
> >
> >
> >
> > From: ukha_d@xxxxxxx [mailto:ukha_d@xxxxxxx] On Behalf =
Of
> > Howard
> > Sent: 17 October 2012 09:46
> > To: ukha_d@xxxxxxx
> > Subject: [ukha_d] Re: Yet another LED GU10 thread...
> >
> >
> >
> >
> >
> > I actually tried a very similar lamp from Brightlightz a while
back. It=
was
> > a 6W, 27 x 5050 LED one. I thought it was rubbish and sent it
back. It =
was
> > nowhere near as bright as a 35W halogen, let alone the 50W-60W
that the=
y
> > claim. The 29 chip one is supposed to be 20% brighter, but I'm
surprise=
d it
> > makes that much difference.
> >
> > Are they really 7W? I'm coming to the conclusion that dissipating
more =
than
> > 4 or 5W in a standard size GU10 while keeping the LED junction
below a
> > reasonable temperature is pretty difficult. I suspect that the 5W
ones =
that
> > I bought may have deteriorated so fast because the LEDs are
running too=
hot.
> >
> > --- In ukha_d@xxxxxxx <mailto:ukha_d%40yahoogroups.com>
, "Adri=
an
> > Eaton" <adrian@> wrote:
> >>
> >> I bought a few LED bulbs over the years and this one is the
closest to=
a
> >> bight wide angle warm white bulb. They use 29 of the 5050 smd
leds whi=
ch
> >> seem to be fairly reliable. (my 21 led versions have lasted
18months s=
o
> >> far). They only drawback is that these bulbs don't come with
a glass f=
ront
> >> like others do, not sure why.
> >>
> >>
> >>
> >>
> > http://www.brightlightz.co.uk/products/5-x-gu10-led-bulbs-7w-spot-lamps=
-with
> >> -27-x-5050-smd-chips-in-warm-white-60w-halogen
> >>
> >>
> >>
> >> Packs of 5 work out =A36.39 each. Not cheap but I calculated
a rough
> > breakeven
> >> point is 12-18 months depending on usage compared to standard
50w. The=
y
> > are
> >> actually slightly whiter than previous warm white bulbs which
I prefer=
.
> >>
> >>
> >>
> >> Adrian
> >>
> >>
> >>
> >> From: ukha_d@xxxxxxx <mailto:ukha_d%40yahoogroups.com>
> > [mailto:ukha_d@xxxxxxx <mailto:ukha_d%40yahoogroups.com>
] On B=
ehalf
> > Of
> >> Howard
> >> Sent: 16 October 2012 14:26
> >> To: ukha_d@xxxxxxx <mailto:ukha_d%40yahoogroups.com>
> >> Subject: [ukha_d] Yet another LED GU10 thread...
> >>
> >>
> >>
> >>
> >>
> >> Sorry for starting yet another one, but maybe things have
moved on a b=
it.
> >> I bought six "9W" GU10s (actually 5W) from The Warm
Light Company earl=
ier
> >> this year. At first I thought they were great, and
recommended them on
> > here.
> >> They have now all failed, so I'm sending them back for a
refund.
> >> Can anyone recommend an LED GU10 replacement, in warm white
with a wid=
ish
> >> angle, that is as bright as a 50W halogen and will actually
last long
> > enough
> >> to justify the purchase price?
> >>
> >>
> >>
> >>
> >>
> >> [Non-text portions of this message have been removed]
> >>
> >
> >
> >
> >
> >
> > [Non-text portions of this message have been removed]
> >
> >
> >
> > ------------------------------------
> >
> >
> > Yahoo! Groups Links
> >
> >
> >
>



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