Ceramic heat emitters do not produce any light.
Did you get a normal reptile heat lamp by any chance? The ceramic heat emitters look like this:
*Edit to add: There are different shapes and sizes of emitters http://www.yeahlite.com/admin/Upjpeg/20074221926130.jpg but they ALL have that twirly bottom.
*Another Edit... Sorry, it's late and I'm sick XD
Definately go for the one that gives off heat only. Especially at night, since hedgies do NOT like light at night, otherwise, they won't come out.