LED lamp vids

[Phil Allison]

**Hi,

these U-tubes are worth a look.

Each "reviewer" gives their impressions and many details about recently
available (in the USA) Philips LED bulbs that are a good approximations to
CFLs.

The 28+ year life claim is rather dubious while the prohibition against use
in sealed or hot environments needs to be taken seriously.

Wonder when they will show up at Woollies .........


.... Phil

 

[Sylvia Else]

**Hi,

these U-tubes are worth a look.

Each "reviewer" gives their impressions and many details about recently
available (in the USA) Philips LED bulbs that are a good approximations to
CFLs.

The 28+ year life claim is rather dubious while the prohibition against use
in sealed or hot environments needs to be taken seriously.

I wonder whether they're misrepresenting the MTBF as being the average
life. This bulb appears to be derived from (or is indeed identical to)
the Ambient Light, which contains electrolytic capacitors. Expecting
25,000 hours average life seems excessively optimistic.

I note that they're offering a 6 year warranty (based on "up to" 3 hours
usage per day - does that mean no warranty for any period if you run it
4 hours a day?). They may be assuming (probably rightly) that few people
would bother to make a claim even if the bulb failed sooner.

Sylvia.

 

[Phil Allison]

"Sylvia Else"

I wonder whether they're misrepresenting the MTBF as being the average
life.

** The figure is the estimated, continuous life of the LED chips used.

This bulb appears to be derived from (or is indeed identical to) the
Ambient Light, which contains electrolytic capacitors. Expecting 25,000
hours average life seems excessively optimistic.

** Good quality electros will easily do that many hours, as it is less than
3 years.

But not if they get too hot.

I note that they're offering a 6 year warranty (based on "up to" 3 hours
usage per day - does that mean no warranty for any period if you run it 4
hours a day?). They may be assuming (probably rightly) that few people
would bother to make a claim even if the bulb failed sooner.

** CFLs are often used as night lights in buildings and homes, running up
to 14 hours per day.

This exceeds the 25,000 hour figure in 5 years, so has to be excluded.

The 28 years life figure is dubious for many other reasons.



.... Phil