Re: [APD] RE: Spiral and multiple-tube small fluorescents.

["S. Hieber" <shieber at yahoo_com>]

Lumens, better?  Yes, but the Photosynthetic region of
light would be best but how often do you get that for
comparing bulbs.

Of course bulbs in diff lamps will give diff results -- it
can all get pretty complicated and most of the
complications are data that one simply doesn't have readily
at hand.  So we use watts to compare like types of bulbs,
understanding the types as incandescents (only about 3-7%
efficient), standard fluoresecents (many times better),
Power Compacts and T5 HO fluoresecents (better yet), and
Metal Halide (generally at the head of the aquatic lighting
pack).

Scott H.
--- Mark Wolek <mwolek at omiintl_com> wrote:
> I've always wondered that, since a 40w bulb is the full
> length of the
> tank....  At any rate, I don't like using watts to
> compare these bulbs,
> because technically they are only 15w etc and people get
> quite confused
> because on the packaging, the SAME AS A 65 WATT BULB!  Is
> what people see
> first and most...lumens would be a more constant
> comparison between the two,
> no?   Could be wrong again lol :)
> 
> Mark
> 
> 
> >O rats, I have to go look this up in my notes again, but
> as
> >I recall, lumens ratings (as opposed to, e.g.,
> candlepower
> >ratings) are total light output, not the brightness of a
> >given area of the bulb.
> 
> >So it's not really a bit off.
> 
> >Scott H.
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> Aquatic-Plants at actwin_com
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