Re: N:Vision CFL's

["Slammer" <mjinks@xxxxxxxxxxxxx>]

"Robert Green" <ROBERT_GREEN1963@xxxxxxxxx> wrote in message

>> >There are lots of competing claims, the most interesting among them
>> >being
>> >CFL equivalency ratings are overblown.  A poster to the discussion at
>> >wikipedia says that his tests show that CFL's claimed to be equivalent
>> >to
> a
>> >100W lightbulb are actually noticeably dimmer.
>>
>> There is lotsa junk out there. Buy junk; get taken.
>

I'd like to point out that all these bulbs, for sale in the USA, are subject
to and must
comply with the FTC Lamp Label Rules. These specify a voltage of 120VAC and
output in AVERAGE INITIAL lumens, power consumed in AVERAGE INITIAL
wattage and life of each lamp in hours.

Rated Life is a median value of life expectancy - the total operating time
at which
under normal conditions 50% of any large group of initially installed lamps
are
expected to be still burning.

In an incandescent lamp, light is generated by heating the filament to
incandescence.
The hotter the filament, the MORE EFFICIENT it is in converting electricity
to light.
However, when the filament operates hotter, its life is shortened so the
design of each
lamp is a balance between efficiency and life. This is why lamps of equal
wattage may
have different lumen ratings and different life ratings.