wrote in message
ups.com...
Hello,
How often do most of you change your CF bulbs? I've got some of the
long 55W & 65W bulbs that I've been using for about 8 months. I'm
starting to suspect a measureable decrease in light output from the
changes I'm seeing in my tank. Maybe I'm just paranoid...
Thanks!
I've read but can't verify as yet (my lights are only 2 weeks old) that
T8/T12's can diminish their output by as much as 50% in the first 6 months,
and the T8's and T5's can go 30% longer, so 8 months sounds about right.
I plan on changing mine every 6 or 7 months, as I am quite paranoid about
lumen, spectrum and CRI output for my new tank
Oz
--
My Aquatic web Blog is at
http://members.optusnet.com.au/ivan.smith