Hi,

Suspending the lighting will reduce the intensity significantly
(Intensity reduces by the inverse square of the distance which means
very quickly).

Other considerations are safety around water with fittings not
designed for that purpose. As many tubes as you want to afford to run
is best. Consider specialised spectrums. There is some discussion at
the links below.

Regards,

Suzi



http://www.keepingfish.com/pageMain....6a733f502 4ea
http://www.keepingfish.com/pageMain....505d878ae 34d

On Mar 13, 6:16 am, cailinsdad wrote:
I need to replace the light on my 29 gallon and I was considering
saving money by using a shop light.

My question, is it reasonable to hang the light a few inches above a
glass top or is it necessary for the light to rest right on the glass?

I was planning to use a 24 in light.

TIA,

Dan