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Re: Lighting effiency
On Thu, 29 Jun 1995 03:39:03 -0400 you wrote:
> fluorescent T12, GE Chroma 50, 1870 lumens, 40 watts,
> 46.75 lumens/watt (similar for a cool white)
> fluorescent T12, GE rare earth, 2960 lumens, 40 watts,
> 74 lumens/watt (typical "aquarium" bulb)
> fluorescent T8, GE rare earth, electronic ballast (!), 2650 lumens, 27 watts,
> 98 lumens/watt (part is T8 and part is electronic ballast)
> MH, E37 VBU, 31000 lumens, 400 watts,
> 78 lumens/watt
With the figures above, why would anyone go MH?
They are expensive, dangerous, and black body at
best. Why not go for phosphors tuned to plant
needs? I am not saying such a tube exists, but I
am saying it is the best choice. Sylvania MUST
have data on GroLux, it's been out for 40 years.
Dave Gomberg, Experimenta San Francisco CA gomberg at wcf_com