Question about lighting

["Dave Clark" <dave at daveworld_us>]

I'm a bit confused about lighting.  I know that florescent bulbs supposedly give out as much light as an incandescent using less electricity.  Say a 20 watt fluorescent gives off the equivalent of a 100 watt incandescent (I have no idea if this is close).  Which wattage do you use when figuring how many watts are shining on your tank?

Thanks,

Dave


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