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Its a basic calculation, if you have this bulb on for 5 hours a day it
will save you 15 cents a day, about $1 a week, in a year it will save
you $50. This is beyond the fact that you will just be buying one and
not replacing it for years. Actually I would think that the true test
of whether this is a good thing for you is what color spectrum you get
out of this thing. Is it a bright color, warm, what is it?