Re: Re: Yet another LED GU10 thread...

[Richard Challis <richard@xxxxxxxxxxxxxxxxxx>]

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.

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.

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.

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.

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/LA029=
89.)
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)

I plan shortly to get some more and get rid of the rest of the halogens.

I have no connection with Toscal other than being a happy customer.

Regards

Richard


On 17 October 2012 10:06, Adrian Eaton <adrian@xxxxxxx> 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
me.=
I
> haven=92t 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=92t come with a glass front to help
with h=
eat
> issues. I don=92t 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 w=
as
> a 6W, 27 x 5050 LED one. I thought it was rubbish and sent it back. It
wa=
s
> nowhere near as bright as a 35W halogen, let alone the 50W-60W that
they
> claim. The 29 chip one is supposed to be 20% brighter, but I'm
surprised =
it
> makes that much difference.
>
> Are they really 7W? I'm coming to the conclusion that dissipating more
th=
an
> 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
th=
at
> I bought may have deteriorated so fast because the LEDs are running
too h=
ot.
>
> --- In ukha_d@xxxxxxx <mailto:ukha_d%40yahoogroups.com>
, "Adrian
> 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
which
>> seem to be fairly reliable. (my 21 led versions have lasted
18months so
>> far). They only drawback is that these bulbs don't come with a
glass fro=
nt
>> like others do, not sure why.
>>
>>
>>
>>
> http://www.brightlightz.co.uk/products/5-x-gu10-led-bulbs-7w-spot-lamps-w=
ith
>> -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.
They
> 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 Beh=
alf
> 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 bit=
.
>> I bought six "9W" GU10s (actually 5W) from The Warm
Light Company earlie=
r
>> 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
widis=
h
>> 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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