Re: NANFA-- light bulbs and tannins

Doug Dame (
Fri, 19 Jan 2001 17:16:40 -0500

Bruce Stallsmith wrote (in part):

>> I'm aching for a meaningful presentation of action
>> spectra on such bulbs, odd as it may seem... (show
>> me your nanometers!).

"Hoa G. Nguyen's low-cost/low-tech Freshwater Planted Aquarium" site ... which I liked A LOT when I first ran across it months ago (and still do) ... actually has a very useful collection of data on various bulb types ... including spectral images he took, using a diffraction filter from Wright Huntley. (In fact, the whole thing reminds me of much of Wright's comments I've seen ... you can put a scientist in a fish-room, but clearly you can't take the empiricism out of the scientist ... or something like that.) I can't recall off-hand if there's discussion there of research into the question of whether the optimum spectrum for submerged freshwater plants is definitely the same as for terrestrial plants, but he (Hoa) approaches the whole question of lighting from the perspective of "where's the sweet spot on the cost/benefit tradeoff of my various bulb options," which is precisely the information I was seeking, but never expected to find in a credible fashion.

The web-site URL is

The URL for the "Flourescent Light Comparison" page is

Well worth a visit, IMO.


Doug Dame
Interlachen FL

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