Gels to adjust color temperature

In an article in one of the fish magazines recently, I read a
recommendation for adjusting the color temperature of our lights by using
photographic gels. The gels are colored plastic sheets generally available.

The idea is not to worry about the color temperature of the lights when we
buy them but to adjust them to what we want by placing the gels between the
lamps and the water in our tanks. Of course, the gels would have to rest on
glass or some other rigid thing.

It strikes me that this might work for adjusting color temperature but
might also reduce the lumens that reach the water. Any

Greg. Tong
San Francisco, CA, USA
gtong at sirius_com

"Every infinity is composed of only two halves."