Nice project - seriously. And the rest isn't meant to be cynical  
either...

On 30.10.2009, at 16:07, Jeffrey Hergan wrote:

> what I need is 300 watts of light

no it isn't.

> I have fluorescent fixtures that produce 100 watt

no you don't. You have fixtures that *consume* 100 Watts of power.


...I would imagine you know some/most of this, but here goes...

Watt is not a measurement of light intensity. It is a gauge of the  
amount of power a light bulb consumes. If you look at energy saving/ 
efficient incandescent light bulbs, you will see that a "modern' bulb  
can be about 4 to 8 times more power efficient than a  "traditional"  
bulb. IOW, you get the same amount of light for far less power  
consumption. So, just for starters, you can divide your wattage by at  
least 5 and reckon with getting the same amount of light.

However, what you really want to know is how much light you need in  
particular locations. Its probably most efficient to have very low  
level environmental lighting and more energetic (and even more energy  
efficient) lighting hitting specific locations - since you won't need  
to have cooking light when you are at your desk. etc.  So you *might*  
get by with as little as a tenth of the power consumption you are  
currently anticipating. (You'll pay for that financially (and heavily)  
up front for expensive tech, but I guess you are anticipating that.

Maybe you could ask in your vicinty if anyone has any light measuring  
instrumentation you could borrow to make some tests to find out how  
much light you need. At the moment all you know (it seems) is how much  
power you are currently consuming to produce an unknown amount of  
light that seems adequate ?

Doubt you'll be finished by dinner time though.

Mark.


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