garage lighting idea, CFL, incan,or 4 footers, 4 foot to cfl and comparrison of all 3 styles Options

[Tom]

So I have three 4-foot shop lights in my garage. When they all are working, the light is pretty good. However, the dern bulbs keep burning out!! I have had CFL's in my outside lights for several years and have yet to have to replace one. So, I thought, why not put CFL's in the garage? So here is what I did. I like it so far and only have two 100 watt CFL's in the fixture, with room to add two more.
Found a fixture at Goodwill for $3.99 and 4 CFL's for $1.49 for two, so a total of less than $8.00 invested and about 1 hour to modify.
First is the before pic and then the after, followed by a couple of the modification pics.
Tom

[Al Meredith]

Lamps are rated in lumens per watt. A lot like Miles per Gallon. Incandescent lamps (100 watt) are 17.5 LPW and fluorescents are 70-80 LPW . You be the judge, 17.5 MPG or 78MPG. He's the math: watt X hours = watt hours, you pay for kilowatt hours so multiply watt used X hours of use and divide by 1000. Multiply that number by the cost of power (about $.10 / KWH ) . ( I payed $.13 here in Atlanta)

3 100 watt lamps X 3000 hours per year = 900000 watt hours or 900 KWH X $.10 =$90.00

1 40 watt lamp X 3000 hours per year =120000 watt hours or 120 KWH X $.10 =
$12.00

100 watt lamps are rated at 750 hours and the 4' fluorescents at 20,000 (with the proper ballast). again , you be the judge.