Are they really that inefficient? SWIMBO wants lampstand with one of
these linear halogen as an uplight and a little reading light
attached. 300w - I'm putting my foot down on that. Nothing more than
10w LED in this house!
Yes, they're inefficient, although not quite as inefficient as
a lower powered (more common) mains halogen lamp. They are horribly
inefficient if dimmed, which tends to be commonly done because
they're often too bright at full power. Think of the dimmer as knob
to turn down the efficiency rather than the power consumption, and
you're pretty much spot on. You can get lower powered lamps which
fit too, although make sure they're the right length (there's
also a shorter standard size, and those won.t work). You can also
buy higher efficency lamps which have an infra-red reflective
coating on the inside of the tube, but they're more expensive.
The EU is due to ban the sale of all halogen lamps in the future.
Their one useful feature is that if there's some insect flying
around the room, you can turn it on for half a minute, by which
time the insect will have turned itself into a whisp of smoke.
There's a safety issue with these, which have resulted in them
being banned in some countries. They have been the cause of some
fires due to being knocked over, something to be wary of if you
have elderly or children there. UL requires than you can knock
one of these over into a test curtain (a hanging cloth made of
muslin), and the light must not be able to ignite the cloth.
Most of the ones sold in europe would fail this test. To pass
the test, the lamp needs a tilt switch to automatically switch
off if it moves off-vertical, and the top needs to be designed
so that all exposed parts are below the fabric ignition
[email address is not usable -- followup in the newsgroup]
On Sun, 15 Nov 2015 07:01:48 +0000, AnthonyL wrote:
Almost nothing when you repurpose them from the *only* task they're
optimised for. external floodlighting. Even worse than when those small
reflector lamps created for shop display spot lighting started to be used
for home lighting purposes (eg downlighters).
I was using reflector spot down lighting long before those LV halogens
were thought of. Directional lighting is ideal for creating a 'mood' in a
If all you want is illumination, fluorescents would be the way to go -
same as in an office or factory.
*It's o.k. to laugh during sex?.?.just don't point!
Dave Plowman email@example.com London SW
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