In continual use, they will have a serious drop in output over a years time
and need to be replaced. In storage, I don't believe they degrade. If they
are used only for a month each year, at the start of the green water season,
then they are usable for a few years, but they will be weaker each year.
--
RichToyBox
http://www.geocities.com/richtoybox/pondintro.html

"Oxymel of Squill" wrote in message
eenews.net...
do they seriously degrade, or do they keep working so long as they light
up?

cheers


"~Roy~" wrote in message
...
The bulbs