Dennis, As someone who is currently growing plants under both fluorescent and HID lights indoors, I can attest to your statement. Even HID lights loose their intensity enough that they must be replaced yearly for optimum efficiency. A 15 year old fluorescent light is positively ancient! I am so glad you thought of changing it and are now having better results. Jacob ---------- - http://www.flickr.com/photos/morabeza79/ On 28 June 2010 18:54, Adam Fikso <adam14113@ameritech.net> wrote: > Good information, Dennis. > > ----- Original Message ----- From: "Dennis Kramb" <dkramb@badbear.com> > To: "OHCPS" <listserv@lists.ohcps.org>; "Pacific Bulb Society" > <pbs@lists.ibiblio.org> > Sent: Monday, June 28, 2010 8:45 PM > Subject: [pbs] terrorarium, not so terrifying anymore > > >> In February I set up a terrarium and planted it with mostly carnivorous >> plants and tuberous gesneriads. As time passed the CPs languished, and >> some >> died. The venus flytraps were sulking so I moved them outside to the bog >> bed where they now enjoy full sun. The gesneriads all showed signs of >> insufficient light, too. >> >> I was completely ignorant of the fact that fluorescent bulbs lose potency >> over time. But I read up on the subject this weekend. My old bulb was 15 >> > > _______________________________________________ > pbs mailing list > pbs@lists.ibiblio.org > http://pacificbulbsociety.org/list.php > http://pacificbulbsociety.org/pbswiki/ >