| |
M1BYT > INFO 17.07.02 12:08l 58 Lines 2731 Bytes #999 (0) @ WW
BID : A70553M1BYT
Read: DB0FHN GUEST
Subj: Re: ZL3VI > lamp life
Path: DB0FHN<DB0ZWI<DB0CHZ<OK0PKL<OK0PPL<RZ6HXA<IK1ZNW<ON0BEL<GB7FCR
Sent: 020717/0951Z @:GB7FCR.#16.GBR.EU #:2812 [Blackpool] FBB-7.03a $:A70553M1B
From: M1BYT@GB7FCR.#16.GBR.EU
To : INFO@WW
KB2VXA Opined with considerable skill:-
> Hello Baden and fellow bulb heads,
> Do you call your observations a scientific study? I don't. Of course, any
> appliance that's hardly ever used will last longer than one that is used
> on a regular basis.
> What's this about 2% brightness? Surely that must be a typo! I would
> consider that lamp dead, even at 20% brightness!
> I just don't get it. Especially in the UK, there seem to be so many
> problems with flourescents it's a wonder anyone uses them. I have never
> in my life seen such problems, either a lamp works or it doesn't. When a
> flourescent goes dead, it simply refuses to start and when it's on a
> starter ballast it comes on so dim with little spots in it that it is
> totally useless and of course must be replaced. I have never seen one
> gradually dim with age.
The light emmission levels of flourescents certainly do dim with age.
This is most noticeable when one tube/lamp is replaced where there are a
number of similar old ones still in use. Allowance is made for the
gradual reduction of the lamps efficency in most lighting design
schemes.
Some companies have a regular relamping policy, replacing all the lamps
with new every few years. They find this economical due to the gradual
reduction in efficency of older tubes and lower output per watt.
Tubes run on a DC supply, such as those found in caravans, tend to
darken at one end after a fair bit of use on a polarized supply.
Swapping the tube over end for end often clears up the blackened end and
extends the useful life.
> Being I see no difference in the lamps themselves, only the ballast
> designed for a different voltage and frequency, maybe some enterprising
> gent will import them from the US and solve your problems. (;->)
The lamps are the same, but perhaps we at this side of the pond are more
perceptive.
ÉÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ»
º 73 from Harry, M1BYT @ GB7FCR.#16.GBR.EU.GBR º
ÌÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ͹
º International Museums Weekend 15+16th June 2002 º
º www.ukradioamateur.org/imw/index.html º
ÌÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ͹
º RAE CD ROM course Project and the Newcomers Intro º
º to amateur radio:- http://www.ukradioamateur.org/ º
ÌÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍËÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ͹
º QTH: Garforth, W. Yorks.. º Timed 10:32 º
º harry_m1byt@ntlworld.com º 17 Jul 2002 º
ÈÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÊÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍͼ
Message sent using WinPack-Telnet V6.80 (DESK)
Read previous mail | Read next mail
| |
