Bulbs/Far Red Light
Subject: Bulbs/Far Red End?
> The only concern I have about the G
> Aquarium bulb is that it says on the package that unlike other b
> produces a relatively high emission of far-red radiation that pr
> and flowering of many types of plants. I think I read here on t
> the far-red spectrum can be bad for aquarium plants and possibly
> growth. Anyone know anything about this?
According to "Biology of Plants" by Peter H. Raven and Helena
Curtis, while red light promotes plant growth, far red light turns
it off like a switch. Experiments were done where if the the far
red light was turned off last, the plants would stop growing
completely. (until the next light period) These _were_
terrestrial plants, though, not aquatics. I guess they use this
principle to control the growth and flowering of various flowering
plants offered commercially so they all come into bloom at the
same (chosen) time.
Aquatic Gardeners Assoc.