Post by Andrew May Post by Andrew Gabriel
I notice a sudden recalculation of the equivalent filament light output
ratings on the packaging of all CFLs in the shops in the UK.
They are now mostly claiming almost the 1:4 ratio I've always stated,
rather than the completely bogus 1:5 and 1:6 ratios they've been
lying about for years. I don't know what triggered this change, but
it was far too long coming.
I noticed that at the weekend. There no longer seem to be any CFLs
available that claim to be equivalent to 100W tungsten.
There never were real 100W equivalents in the supermarkets
(which only stock lamps up to around 18W), but of course
they used to claim to be, which was probably the main cause
of the complaint that they were too dim when people tried
their first one. If you go to more specialist outlets (often
mail-order), then there are CFLs available up to 100W (native)
The only honestly marked 100W equivalents I've seen before the
recent change are the Feit ones stocked by Costco - 23W large
spiral tube which is genuinely equivalent to an old 100W (and
I've found to be very good in all other respects such as long
life at high temperature running, sustaining full light output
during life, instant-on). Only problem in some fittings will be
physical size, as efficient light output demands a large spiral.
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