BulbCollector Forums

BULB BANTER => General Discussion => Topic started by: northlights on April 12, 2006, 12:22:49 pm

Title: Aquarium Bulbs
Post by: northlights on April 12, 2006, 12:22:49 pm

Subject: Aquarium bulb

Hi, would you be able to tell me what the light blue powder is in an
PennPlax or Hagen Gro bulb. They are used for plant growth in aquariums.
I think the blue color blocks out the yellow light that plants do not
like. It is not fluorescent, it is incandescent, about 5 inches cigar
shaped, screw in type.? Unfortunately I broke one on the floor the other
day, swept it up and then vaccummed the tiny bits. Because it was
incandescent I didn't think about Mercury but I began to wonder? What is
this powder? Can you help? Thanks Doug

Title: Re: Aquarium Bulbs
Post by: mr_big on January 15, 2007, 06:01:36 am

that is simply it a blue powder designed to block yellow light couldn't be a fluorescent as they need mercury and a ballast