The one I remember in Woolies had big pushbuttons at either side of the
box. Both had to be pressed to power up the bulb, ensuring that both
hands were well clear of the connector when it was live.
Must have been a very advanced safety measure for that era.
You still can rough service incandescent lamps if you want. It was an
easy loop hole in the "ban" of incandescent lamps.
There seems little point in them now that LED lamps are so cheap. And
the plastic LEDs bounce when you drop them:-)
But there was a loophole - 'special purpose' bulbs were permitted. So
the energy saving reason for the ban was defeated by allowing rough duty
bulbs which were less efficient than the banned standard bulbs.
... which likely never existed in the first place.
(Yes, yes, I know CRLs and LEDs are more energy efficient than incandescents,
but they also cost a great deal more to make, and don't last as long as
Today is Setting Orange, the 37th day of Discord in the YOLD 3184
Ph'nglui mglw'nafh Cthulhu R'lyeh wgah'nagl fhtagn.
On Sat, 21 Apr 2018 20:08:41 +0000, Andrew Gabriel wrote:
It's 6.6W for their 470 and (if you can still find any) 510 Lm GLS
lamps. The standard "A bulb" types seem ok but the smaller golf ball
versions seem to suffer premature failure (from a sample of just one),
presumably from overheating due to their smaller surface area.
The £2.99 1500Lm "100W incandescent equivalent" in Home Bargains
(claimed to be just 12W but on test, more like 14 to 15 watts), seem to
survive ok in reasonably ventilated lamp holders.
Mind you, I had my suspicions about brightness of an early one (bought
just over a year ago now) confirmed by comparison with a later one bought
a couple of months ago so took it back about a fortnight before the basic
12 month warranty had expired and, after being handed an LES instead of
the BC version in exchange due to my taking my eye off the ball due to
the importance of colour temperature matching (I wanted a warm white
2700K version which the shop appeared to have run out of), I got a refund
on return of the LES version.
I managed to find a warm white BC lamp in another of their stores a week
or two later. I've never been tempted to try their cool white versions
since the much higher cool white colour temperature of 6500K, rather than
a more reasonable 4000K or even 5500K option rather puts me off them.
Now, I'm thinking that perhaps I should try at least one just to see for
myself just how cool (north sky light) they actually are.
The business of the specified actual consumption of LED GLS lamps
turning out to be some 10 to 15 percent higher seems to be a common
feature of all the LED GLS lamps I've bought over the past 5 or 6 years.
As long as that just means they're slightly over-running a 12W LED at the
same 125LPW efficiency level and they're still coping with the extra
dissipation ok, as they seem to do, I don't mind since that means extra
light over and above the claimed, in this case 1500Lm (about 1700Lm or
so) which imo, is no bad thing.
It might be an effect due to the ballast being designed to meet a
minimum lumens output requirement at the lowest end of the voltage
tolerance range (207vac) when run on a 240v supply (or perhaps not - I'm
only guessing at a possible legitimate reason for this consistent
departure between fact and fiction).
The various wattage standards for incandescent GLS lamps were the result
of compromise between acceptable light levels and acceptable energy costs
(we were all in the same boat, service life-wise anyway). As a result, we
came to accept a much lower level of light than would have otherwise been
chosen if "Price had been no object". Now that the energy costs to run
lamps with higher light levels associated with 100W incandescents are
only about an eighth of what they once were, we can now sensibly choose
by desired light levels alone rather than a compromise between running
costs and light levels.
We're still less than halfway to the 303LPW level achieved in Cree's
laboratory just over four years ago now so there's the promise of even
higher efficacy lamps able to match 150 and even 200 watt incandescents
without overheating in a standard GLS light fitting in the next couple of
Contrary to what Cree's CEO of lighting development and marketing
claimed about the lead time for laboratory developments only taking some
18 to 24 months to reach the shop shelves, their own development landmark
chart indicates a lead time of typically ten years which, in the case of
their record breaking achievement of a 303LPW lamp in the lab way back in
March 2014, means we could possibly see 280 to 300 LPW GLS lamps becoming
available around 2024/2025. In the meantime, we might get to see
equivalents to 150W incandescent GLS lamps appearing in the shops in the
next year or two and we can all look forward to a brighter future. :-)
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