Re: NANFA-- light bulbs and tannins
Thu, 18 Jan 2001 09:46:10 -0600

On 18 Jan 2001, at 9:59, Scott D. Goett wrote:

> I have 2 questions. One is about those twisty fluorescent bulbs that
> are said to have the brightness of a 75 watt buld but only use 20
> watts. My question is when you are calculation the watts per gallon,
> which number do you use? Are those bad bulbs to use?

The 4 watts per gallon rule applies to most fluorescents, including the compact fluorescents you are talking about. But be aware that the CF's sold in Home Depot are not of the best spectral type. You will find that the G.E. "Sunlight" bulbs are much better suited for planted aquaria.


Home Depot
Certified Lighting Professional

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