[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: FAQ on lighting is underdetermined
On Thu, 12 Aug 1999, Dan Drake wrote:
> [New to this list, if not to growing plants under water. Hello,
> The FAQ section on lighting gives a formula for computing reasonable
> light levels for a planted tank: multiply the surface area by the
> distance from the light source, multiply that by a fudge factor, and you
> get watt-hours per day. But it doesn't seem to tell what *units* you
> express the inputs in. Doing some orders of magnitude in my head, I think
> it that inches might work, but is this right?
It's a completely bogus document, and I (the editor) am the first to admit
this. It's just a matter of finding time & interest to re-write it in an
> (BTW the section on suppliers still lists Dupla as if it were available
> through U.S. sources.)
This I will change. Thanks.
erik at thekrib dot com