Electronic halogen transformers are unregulated, but have a cut-out
if the load is less than around 1/3rd of the max output, to protect
the lamps from unregulated overvoltage. This generally causes the
pulsing on and off. (The irony is that LED lamps generally have
built-in regulation are wouldn't care about over voltage, but the
electronic transformer doesn't know that.)
You could replace the electronic transformer with a lower powered one
designed for LEDs (and these are regulated).
[email address is not usable -- followup in the newsgroup]
You need to ensure that the ones you use, are definitely designed for
240v - not the EU's 230v which so many sell.
I bought a few from Ebay they turned out to be 230v and lasted just
weeks. The present ones came from Poundland, marked 240v oven lamps and
have lasted around 2 years so far.
On Fri, 16 Dec 2016 10:26:52 +0000, DerbyBorn wrote:
The distributors of incandescent filament lamps *are* fully aware of the
*notionality* of the UK's "230" volt supplies and the need to supply 240v
lamps that *actually* match the *actual* local supply voltage used in
virtually every region of the UK. That's why, if you bother to look
closely, you'll find them marked as 240v lamps.
Unless your particular electricity supply *is* set to a *nominal* 230v
rather than the nationwide 240v used almost everywhere else in the UK,
any such lamps marked as 230v ought to be returned to the supplier as
"Not fit for purpose".
On the one hand, they'll have a higher efficacy but on the other,
they'll suffer a shortened life as a result. This may or may not suit
your needs but is the reason why tungsten filament lamps are so tightly
specced to the voltage of the supply in and around the locality of the
retail and trade supply outlets.
Wondering how LEDs would cope with the heat?
I replaced the single pathetic light on my oldish hood with three low
voltage downlighters, fed with a proper transformer, many years ago. Not
replaced a bulb since. Low voltage ain't so susceptible to vibration as
*We never really grow up, we only learn how to act in public.
Dave Plowman email@example.com London SW
The LEDs themselves would be fine although their plastic casing might
yellow but the capacitors in the power supply would die horribly at
anything above 105C. Whereas LEDs in fridges would be ideal.
Oven bulbs have to be engineered for their hotter environment.
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